B
生物医药大词典
by MedSci
菜单
词典
分类
百科
诗词
背单词
英文名
DeepEvidence ↗
确认登录状态…
例句 /
Airplanes and helicopters take off. Rockets and spacecraft lift off.
Airplanes and helicopters take off. Rockets and spacecraft lift off.
指火箭和宇宙飞船发射升空。