B2 noun, verb /stɛm/
stem
茎 / 遏制
Meaning
Noun: The main stalk of a plant. Verb: To stop or restrict the flow or development of something.
Example
The gardener cut the stem of the rose; New policies aim to stem the flow of pollution.
园丁剪下了玫瑰的茎;新政策旨在遏制污染的流动。