2016-2017学年人教版选修7 Unit 2 Robots language points 课件(40张)
2016-2017学年人教版选修7  Unit 2 Robots  language points  课件(40张)第5页

1. test out

Scientists test out theories by experiment. 科学家靠实验检验理论。 test The teacher tested the children on their homework. 老师就孩子们的家庭作业进行检查。

试验;考验

vt. 测验;检验;试验;检查