When senior scientists talk blue sky, the clouds are about to roll in.
当老科学家在谈天空的蓝色时，云团蜂拥而至。
Roll the line to about 80%, and coil up at the end.
将线捆到约80%，然后在末端造一个线圈。
Sometimes scientists can tell when snow or ice is about ready to roll.
有时，科学家能够知道，雪或冰马上要崩塌的时间。
ZIP: Whoops. ? Satellite feed's showing$your train's about to roll.
糟了。卫星讯息显示$你的火车要开动了。
ZIP: Whoops. ? Satellite feed's showing$your train's about to roll.
糟了。卫星讯息显示$你的火车要开动了。
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