stem

英[stem]美[stem]
  • n. 柄；茎；干；船首
  • vi. 起源于
  • vt. 抽去 … 的梗；给 … 装柄；逆 … 而行；阻止，遏制

    • 记忆方法

    词源词根法
    来自古英语stemn，植物茎，树干，来自Proto-Germanic*stamniz，站立，来自PIE*sta，站立，词源同stand,state.引申诸相关词义。
      noun(名词)
      1. 主干
      2. （植物的）干，茎，梗，柄
      3. （高脚杯的）柄脚
      4. 词干
      5. （手表的）发条转柄，拨针柄
      6. （船）艏，艏柱
      verb(动词)
      1. 阻挡;阻止;遏制
      2. 堵住，止住（出血等）

    双解例句

    noun(名词)
    1. 主干
    2. （植物的）干，茎，梗，柄

      flower stems

      花茎

    3. （高脚杯的）柄脚

      Champagne glasses usually have long stems.

      香槟酒杯通常有长长的柄脚。

    4. 词干

      From the stem “sav-” you get “saves“, “saved“, “saving“, and “saver“.

      由词干 sav- 可以衍生出 saves，saved，saving 和 saver。

    5. （手表的）发条转柄，拨针柄
    6. （船）艏，艏柱
    verb(动词)
    1. 阻挡;阻止;遏制

      These measures are designed to stem the rise of violent crime.

      这些措施旨在遏制暴力犯罪的增加。

      We must take action to stem the tide of resignations.

      我们必须采取行动制止愈演愈烈的辞职潮。

    2. 堵住，止住（出血等）

      She tied a handkerchief around the wound to stem the flow of blood.

      她用手帕系住伤口来止血。

    小知识

    A stem is a plant's stalk, and it's also a verb meaning “grow out of.” So roses have stems, and your idea to give roses to your mom for her birthday stems from her love of flowers.

    A stem can be the central root of a word, the supporting structure of a plant, or the thin, cylindrical part of a glass goblet. When one thing stems from something else, it originates or begins growing there: “His vegetarianism stems from his love of animals.” An older meaning of the verb is “stop the flow of something,” as in “Stem your nosebleed with this tissue!” or “Some people think streetlights will stem the graffiti on that street.”

    实用短语

    1. stem cell

      干细胞,造血干细胞,间充质干细胞,全能性细胞

    2. stem-loop

      茎环,结构,颈环

    3. stem mut

      阀杆螺母,阀杆螺丝帽

    4. stem from

      来自,来自于

    5. stem rust

      秆锈病,杆锈

    6. neural stem cell

      神经干细胞,干细胞,分离出神经干细胞,出神经干细胞

    7. rising stem

      明杆,升降式,铸铝黄铜

    8. cancer stem cell

      癌干细胞,肿瘤干细胞,

    常用短语

    1. stem cell

      干细胞，骨髓干细胞

    2. stem from

      起源于

    3. brain stem

      脑干

    4. drill stem

      钻柱；钻杆；钻具

    5. main stem

      [美俚]干线；主街

    6. valve stem

      【机】阀杆

    7. from stem to stern

      完全；从头到尾

    8. stem rust

      杆锈；茎锈病

    9. hemopoietic stem cell

      造血干细胞

    10. stem borer

      蛀茎虫；天牛；蔗螟；茶天牛

    11. rising stem

      升杆

    12. stem seal

      阀杆密封；芯轴密封

    单词用法

    动词辨析
    stem,arise,derive,emanate,originate,proceed,spring这组词均可表示“出现”，其区别在于1.spring强调经过一段时间或准备后突然出现。2.arise强调产生的事实，暗示从无到有，也指某事物导致的结果。例如I think there?s a storm arising gradually.我看风暴即将来临。There?s trouble arising gradually at the meeting.会上一场纠纷正在酿成。3.originate指来源于特定的根源或起点。例如All theories originate from practice and in turn serve practice.任何理论都来源于实践，反过来为实践服务。The style of architecture originated with the ancient Greek.这种建筑风格起源于古希腊。4.derive指由另一形式的事物衍生而出或者从另一些人处取得。例如The word derives from French.这个词来自法语。English derives in the main from the common Germanic stock.英语主要源于日耳曼语族。5.emanate指从一事物转变为另一事物。例如Can we emanate to the next question?我们能转入下一个问题吗?6.proceed指自某处发出或产生，强调根源或原因。例如His mistake proceeded from his ignorance of it.他的错误是出于他对那件事的无知。Wrong opinions often proceed from lack of information错误的看法往往产生于不了解情况。7.stem指合乎自然规律地产生，也指在某人或某事物的影响下产生或从属于某人或某物发展。例如We can stem great pleasure from our studies.我们可以从读书研究中获得极大的乐趣。He stemmed his enthusiasm for literature from his father.他对文学的爱好是受他父亲的影响。
    重要短语
    stem cell干细胞，骨髓干细胞
    stem from起源于
    brain stem脑干
    drill stem钻柱；钻杆；钻具

    反义词

    stern

    同根词

    词根：stem

    adj.

    stemmed去掉茎或梗的；有茎或梗的；装有…柄的

    stemless无茎的；无梗的

    n.

    stemmer抽梗机，除梗器；抽梗工人

    v.

    stemmed起源于（stem的过去分词形式）；除去…的茎；给（假花等）装梗