system
太阳系具有下述两个显著特征。
Two further aspects of the solar system are notable.
fasten
特德六岁的时候，我们认为他得知道如何系上和解开安全带了。
When Ted was six we decided that he needed to know how to fasten and unfasten his seat belt
匿名回答于2024-05-29 18:59:59
