睡眠专家经常把睡眠不足的人比作酒后司机：他们开车的时候不会想着可能会撞死人。
Sleep experts often compare people without enough sleep to drunk drivers: They don't get behind the wheel thinking they're probably going to kill someone.
交通口号：如果你的孩子还没到开车的年龄，不要让他们开，否则他们永远也不会到这个年龄。
A traffic slogan: Don't let your kids drive if they are not old enough or else they will never be.
许多美国人自己就可以做家务，开车或者是修理庭院，他们不会雇佣别人来做。
Many Americans who could afford household help or a driver or a gardener do not employ them.
许多美国人自己就可以做家务，开车或者是修理庭院，他们不会雇佣别人来做。
Many Americans who could afford household help or a driver or a gardener do not employ them.
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