stem

英 [stem]

美 [stem]

n.  (花草的)茎; (花或叶的)梗，柄; (高脚酒杯的)脚; 烟斗柄
v.  阻止; 封堵; 遏止

复数：stems　过去式：stemmed　现在分词：stemming　第三人称单数：stems　过去分词：stemmed　

CET4CET6考研TOEFLIELTSGRETEM4TEM8

Collins.3 / BNC.4527 / COCA.3414

短语用例

stem from sth

• 是…的结果；起源于；根源是
  to be the result of sth

习惯用语

n.

from stem to stern
• 从船头到船尾
  all the way from the front of a ship to the back

牛津词典

noun

• （花草的）茎；（花或叶的）梗，柄
  the main long thin part of a plant above the ground from which the leaves or flowers grow; a smaller part that grows from this and supports flowers or leaves
• （高脚酒杯的）脚
  the long thin part of a wine glass between the bowl and the base
• 烟斗柄
  the thin tube of a tobacco pipe
• 有…茎（或梗）的
  having one or more stems of the type mentioned
  1. a long-stemmed rose
     一枝长茎玫瑰
• 词干
  the main part of a word that stays the same when endings are added to it
  1. ‘Writ’ is the stem of the forms ‘writes’, ‘writing’ and ‘written’.
     writ是writes、writing和written三个词的词干。

verb

• 阻止；封堵；遏止
  to stop sth that is flowing from spreading or increasing
  1. The cut was bandaged to stem the bleeding.
     伤口进行了包扎止血。
  2. They discussed ways of stemming the flow of smuggled drugs.
     他们讨论了遏制走私毒品流通的办法。
  3. The government had failed to stem the tide of factory closures.
     政府没有控制住工厂纷纷倒闭的势头。

柯林斯词典

• VERB 起源于;来自;由…造成
  If a condition or problemstems fromsomething, it was caused originally by that thing.
  1. All my problems stem from drink...
     我所有的问题都源于酗酒。
  2. Much of the instability stems from the economic effects of the war.
     不稳定局面多半是由战争对经济的影响造成的。
• VERB 阻止;遏制;制止
  If youstemsomething, you stop it spreading, increasing, or continuing.
  1. Austria has sent three army battalions to its border with Hungary to stem the flow of illegal immigrants...
     奥地利已派出 3 个营的兵力去本国和匈牙利交界的边境地区阻止非法移民的流入。
  2. The authorities seem powerless to stem the rising tide of violence...
     当局似乎无力阻止愈演愈烈的暴力活动。
  3. He was still conscious, trying to stem the bleeding with his right hand.
     他依然清醒，正试图用右手止血。
• N-COUNT (植物的)秆，茎，梗
  Thestemof a plant is the thin, upright part on which the flowers and leaves grow.
  1. He stooped down, cut the stem for her with his knife and handed her the flower.
     他弯下腰，用刀替她将花茎割断，然后将花递给她。
• (酒杯的)颈，柄脚
  Thestemof a wine glass is the long thin part which connects the bowl to the base.
• N-COUNT (烟斗)柄
  Thestemof a pipe is the long thin part through which smoke is sucked.
  1. He chewed the stem of his pipe and eyed her sceptically.
     他嘴里衔着烟斗柄，满腹狐疑地打量着她。
• (语法中的)词干
  In grammar, thestemof a word is the main part of it, which does not change when the ending changes.
• PHRASE 从船首到船尾
  If something happensfrom stem to sternon a boat, it involves the whole of the boat.
  1. A South African television report said the ship was ablaze from stem to stern.
     南非一则电视新闻报道称，那艘船从头到尾都着了火。

英英释义

noun

• a turn made in skiing
  Synonym:stem turn
• front part of a vessel or aircraft
  1. he pointed the bow of the boat toward the finish line
  Synonym:bowforeprow
• cylinder forming a long narrow part of something
  Synonym:shank
• the tube of a tobacco pipe
• (linguistics) the form of a word after all affixes are removed
  1. thematic vowels are part of the stem
  Synonym:rootroot wordbasethemeradical
• a slender or elongated structure that supports a plant or fungus or a plant part or plant organ
  Synonym:stalk

verb

• remove the stem from
  1. for automatic natural language processing, the words must be stemmed
• stop the flow of a liquid
  1. staunch the blood flow
  2. stem the tide
  Synonym:stanchstaunchhalt
• grow out of, have roots in, originate in
  1. The increase in the national debt stems from the last war
• cause to point inward
  1. stem your skis

双语例句

• We will need to finance research in technology innovation and biotechnology, including stem cell research.
  我们需要为技术创新和生物技术提供研究资金，其中包括干细胞研究。
• Twist the string carefully around the second stem with the other hand
  用另外一只手小心地把细绳缠绕到第二根茎上。
• The scientists said they developed stem cell lines from two of these cells.
  科学家们称他们从这些细胞中的两个细胞中发展了干细胞序列。
• The stinging nettle has a square stem and little hairs.
  荨麻长有四方茎和细小茸毛。
• All my problems stem from drink
  我所有的问题都源于酗酒。
• He developed embryonic stem cells that could produce mice that carried new genetic material.
  他发展了胚胎干细胞，此类细胞能够产生携带新遗传物质的小鼠。
• Austria has sent three army battalions to its border with Hungary to stem the flow of illegal immigrants
  奥地利已派出3个营的兵力去本国和匈牙利交界的边境地区阻止非法移民的流入。
• Mesenchymal stem cells can differentiate into bone, fat, cartilage and other types of cells.
  间充质干细胞能分化成骨、脂肪、软骨和其他种类细胞。
• Make a slit in the stem about half an inch long.
  在树干上切一道大约半英寸长的口子。
• He was still conscious, trying to stem the bleeding with his right hand.
  他依然清醒，正试图用右手止血。