Retrovaccination
還原接種法
??? 情景例句
They'll just make him sad.
那些只會(huì)讓他悲傷。
In for a penny,in for a pound.
做事一開頭，就要做到底；一不做，二不休。
An aeroplane offers you an unusual and breathtaking view of the world.
飛機(jī)上，你可以觀察世界上非同尋常的奇妙的美景。