1·We often carry on a lot of operations in the rabbits. Success or failure and mastership degree of experimental operation affect directly the research results and teaching effect.
在家兔的实验中经常要进行各种操作，这些操作的熟练程度直接影响到研究结果和教学效果。
2·The size and the mastership of vocabulary greatly affect a speaker's English level.
词汇量的大小和使用的熟练程度影响着外语使用者的外语交际能力。