The basic unit of society is the family.

社会的基本单位是家庭。

《牛津词典》

He can't grasp the basic concepts of mathematics.

他无法掌握数学的基本概念。

《牛津词典》

He doesn't have mastery of the basic rules of grammar.

他没有掌握基本的语法规则。

《柯林斯英汉双解大词典》

The "Humanitarian Action Report" discusses several issues that UNICEF says increasingly threaten the basic rights of women and children.

VOA: special.2010.02.15

By the way, in what I'm saying, I oversimplify by supposing that the basic unit of language is a word.

因为我想说的是，我们现在是把语言的基本单位简单化了。

耶鲁公开课 - 文学理论导论课程节选

The basic idea is, you take a guess and you -- whoops -- and you find the tangent of that guess.

首先取个猜想数,然后，嗯,去取猜想数那儿的切线。

麻省理工公开课 - 计算机科学及编程导论课程节选

His research interests in the Geoenvironmental Engineering field range from the basic to commercial development.

UNESCO: Purpose/Objectives of the Chair/UNITWIN Network

The basic fare across public transport is 50p, but the Istanbulkart smart card gives discounts.

BBC: Mini guide to historic Istanbul

The advantage of this approach is that it retains the basic fibre-plus-matrix structure of the material.

ECONOMIST: Monitor