Ergin
组素, 促变应素
🗣️ 情景例句
We have several package tours you may choose, from ten days to three weeks in Europe.
我们有几套欧洲旅游计划选择，时间从10天到3个星期。
Whom will you give them to?
你将把它们给谁？
hold the string so that the weight nearly touches the ground.
让重物几乎接触地面。