a central part of something from which other parts can develop or grow, or which forms a support

the stick-like central part of a plant that grows above the ground and from which leaves and flowers grow, or a smaller thin part that grows from the central part and supports the leaves and flowers

flower stems 花茎

the thin vertical part of a glass or similar container that joins the part that holds liquid to the flat bottom part on which it stands

Champagne glasses usually have long stems. 香槟酒杯通常有长长的柄脚。

the part of a word that is left after you take off the ending

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。

the small part on the side of a watch that you turn to move the hands (= parts that point to the numbers), or to make the watch operate

the main supporting structure at the front of a ship

from stem to sternidiom US 从头至尾

to stop something unwanted from spreading or increasing

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。

to stop the flow of a liquid such as blood

She tied a handkerchief around the wound to stem the flow of blood. 她用手帕系住伤口来止血。

stem from somethingC1 源自;由…造成

abbreviation for Science, Technology, Engineering, and Mathematics (as subjects of study)

We work with schools and colleges to help educators inspire students in STEM. 我们与学校和学院合作，帮助教育工作者激励学生学习科学、技术、工程和数学等科目。

We want to see more girls and women studying STEM subjects. 我们希望看到更多的女孩和妇女学习科学、技术、工程和数学等科目。