Silicea
硅剂
🗣️ 情景例句
Do you have any plans after class today?
今天下课后你有什么安排吗？
Do you intend to finish before you leave?
你在出去以前要把它做完吗？
She watched TV for half an hour after supper. Then she started her homework.
晚饭后她看了半小时电视。然后她开始做家庭作业。