重点讲解：
1. all at once 同时；一起；
例句：A number of things happened all at once.
几件事一起发生了ypq!@Ms9BV0;g。
2. as usual 像平常一样；照例；
例句：She was getting breakfast as usual.
她像往常一样在准备早餐dm=9|jYpYzO3f。
3. thanks to 幸亏；归因于；
例句：They were already under stress, thanks to the aftershock of last year's drought.
去年遭受的旱灾让他们心有余悸、倍感忧虑xhJyuN@(FcF%。
4. lead sb. to do sth. 促使；使得；使；
例句：His actions lead me to distrust him.
他的行为使我不信任他.mtpp+c;xUT2lH^。