这个程序由任意数量的语句构成，语句由任意数量的表达式构成。

This program is composed of an arbitrary number of statements which are composed of an arbitrary number of expressions.

youdao

注意，在JPQL中不能表达等效的查询，因为它的语法仅支持固定数量的表达式。

Notice that an equivalent query is simply not possible to express in JPQL, because it has a defined grammar with a fixed number of supported expressions.

youdao

到公元前2300年，所需的符号数量已减少到600个，词汇可表达的范围也扩大了。

By 2300 B.C.E. the number of signs required had been reduced to 600, and the range of words that could be expressed had widened.

youdao

This is what makes cells different, the number and quantity of the genes that they express.

这就是细胞产生差异的原因,即表达的基因在数量和质量上的差异

耶鲁公开课 - 生物医学工程探索课程节选