difficulty degree造句怎么写

2、The English conceptual system was interacting with Chinese conceptual system in deciding the difficulty degree of learning the second language.

1、When evaluating the quality of test paper, the model of test paper distinguishing degree, difficulty degree, effectiveness degree and believable degree are set up.

3、The improvement to the method of variable combination makes the problem of dual variable separation in geometric programming with a multi difficulty degree simple and easy to solve.