The instrumental variable in this instance allows a clear, credible estimate of the return from extra schooling for those most inclined to drop out from school early.
在这一研究中，对于那些倾向于尽早离开学校的人而言，使用辅助变量法就能够得出清晰可信的结果。
Your child is exhausted from after-school soccer, ballet and Chinese lessons, but you won’t let her drop the piano lessons.
你的孩子从足球培训班或是芭蕾，中文班回来已是筋疲力尽，你却还让他练习钢琴。
Up to a third of students with ADHD drop out of high school, and they're also less likely to attend and graduate from college.
三分之一患有该病的学生高中就辍学了，他们继续完成大学学业的可能性也不大。
I had to call hubby home from work to do school drop off and to spend the day entertaining our son in the yard and garden so he wouldn't climb on me and whine all day while I laid in bed.
我不得不叫丈夫回家接孩子放学，让他和儿子在院子里玩，这样我躺着的时候，孩子就不会爬到我身上来了，也不会整天哭泣了。
China and other countries found that even when children from the countryside do start school, they have a tendency to be absent and often drop out later.
中国和其他国家都发现，即使农村孩子上了学，他们会常常缺课，到最后还得辍学。
He took me to a ground school. The first day's training included several hours of instructions but not my first drop from an airplane for this.
他把我带到一所地面培训学校。第一天是几个小时的培训，但是没有讲我该如何进行首次跳伞。
He took me to a ground school. The first day's training included several hours of instructions but not my first drop from an airplane for this.
他把我带到一所地面培训学校。第一天是几个小时的培训，但是没有讲我该如何进行首次跳伞。
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