1.
The Missionary Preschool Education and the Modernization of China's Prechool Education
教会学前教育与中国学前教育近代化
2.
day care for pre-school children
学前儿童日间照顾服务
3.
Merrill Palmer Preschool Performance Test
梅粕二氏学前操作测验
4.
Kaufman Infant and Preschool Scale
考夫曼婴儿和学前量表
5.
Lectures on Scientific Frontier (Astronomy)
科学前沿讲座(天文)
6.
Parents' Association of Pre-school Handicapped Children
学前弱能儿童家长会
7.
Ho Wing Scholarship (Pre-war)
何荣奖学金（战前）
8.
someone who quits school before graduation.
在毕业前退学的学生。
9.
Influence of preoperative visiting on preschool children and their parents.
术前访视对学龄前患儿及家长的影响
10.
We studied Lesson 6 the day before yesterday.
我们前天学习了第六课。
11.
Promising is a diligent student.
用功的学生有前途。
12.
The students have not yet returned to classes.
目前学生还没有上课，
13.
He is my former classmate.
他是我从前的同班同学。
14.
He took to studying English 5 years ago.
他五年前开始学英语。
15.
I learned to swim five years ago.
我五年前学会了游泳。
16.
He taught physics to the students at a college ten years ago.
十年前他在大学教物理。
17.
pre-steady state kinetics
恒态前的酶促动力学
18.
(heraldry) looking forward.
（纹章学）向前看着的。