✅ 同义词
🗣️ 情景例句
This spring is the origin of the brook.
这泉水是那条小河的源头。
Does it make any difference to you whether we have our lesson at two o'clock or at three o'clock?
我们在两点上课还是在三点上课，你觉得有关系吗？
I'm your new teacher this term.
这个学期我是你们的新老师。