1.
It be necessary that he study maths .
他学数学是必要的。
2.
I think it necessary to learn science.
我认为学科学是必要的。
3.
On the Necessity of Enriching Mathematics Teacher’s Knowledge of Mathematics History;
谈充实数学教师数学史知识的必要性
4.
attendance is oBligatory. Mathematics is an oBligatory course.
出席是必须的，数学是一门必修课
5.
What is important to us is to learn maths .
我们重要的事是学数学。
6.
On the Necessity of Setting up Mathematics Experimental Courses in Colleges and Universities;
高校数学教学中开设数学实验的必要性
7.
The mathematics is obligatory course inside the school.
数学是学校里的一门必修课。
8.
Is literature indispensable?;
文学是必要的吗?——在汕头大学的演讲
9.
All students are put through the hoop at the beginning of the year, to see if they have the right qualities.
所有的学生年初都要接受检验，看他们是否具有必要的素质。
10.
He is the math wiz of his class.
他是他班里的数学天才。
11.
Biochemistry is a fundamental and compulsory course for students who major in biology-related specialties.
生物化学是生物学领域各专业学生必修的一门重要专业基础课，是学习其他相关专业课的基础。
12.
literature and art of a higher level are entirely necessary for them. To ignore this would be a mistake.
比较高级的文学艺术，对于他们是完全必要的，忽视这一点是错误的。
13.
A Brief Talk On the Necessity of Higher Mathematics For Liberal Arts;
浅谈文科《高等数学》教育的必要性
14.
The necessity to expound ethnic cultures from cultural philosophy;
对少数民族文化作哲学阐释的必要性
15.
Based on Meteorological Parameters to Determine the Water Source Heat Pump
气象学参数是确定水源热泵空调系统冷/热负荷的必要依据
16.
Necessity of Implementing Inquiry Learning in New Mathematical Course;
数学新课程中实施探究性学习的必要性刍议
17.
The necessity of modeling thoughts into advanced maths teaching;
建模思想渗透到高等数学教学中的必要性
18.
He was a decent scholar and mathematician, and taught Pen as much as the lad was ever disposed to learn, which was not much.
他是一个正派的学者和数学家，只要潘愿意学，他就尽量教他，可惜孩子不太想学。