🗣️ 情景例句
Haven't I seen you before?
我以前没见过你吗？
Learn to walk before you run.
循序渐进。
One authority on spiders made a census of the spiders in grass field in the south of England,
一位研究蜘蛛的权威对英国南部一块草坪上的蜘蛛作了一次调查。