从该星系中心收到的无线电信号证实了黑洞理论。Radio signals received from the galaxy's centre back up the black hole theory.他们发现了以往想象不到的新客体 —— 脉冲星 、 类星体和黑洞.They have discovered now , previou sly unimagined objects - pulsars, quasars, and b...
安妮把床铺都整理好，然后把幼儿室收拾停当。Anne made the beds and tidied up the nursery.学步幼儿的蹒跚脚步a toddler's first few halting steps幼儿游戏组给孩子很多启发.The playgroup provides plenty of stimulation for the children....
It helps them to unwind after a busy day at work.这有助于他们忙碌一天后放松自己。to unwind a ball of string解开一团绳A glass of beer before dinner helped him unwind.饭前喝一杯啤酒使他轻松了....