Base class sub-objects may have zero size.

基类子对象可以具有零大小。

youdao

Specially, science fiction is a sub-class of prose fiction, for nearly every piece of science fiction is either a short story or a novel.

特别是，科幻小说是散文小说的一个子类，因为几乎每一部科幻小说都是短篇小说或长篇小说。

youdao

Especially, science fiction is a sub-class of prose fiction, for nearly every piece of science fiction is either a short story or a novel.

特别是，科幻小说是散文小说的一个子类，因为几乎每一部科幻小说都是短篇或长篇小说。

youdao

The year the oldest Ohio-class ballistic-missile sub completes its final nuclear patrol is now expected to be 2027, which sounds a long way off until you realize it takes nearly two decades to design, develop, build and test the lead ship in a successor class.

FORBES: The Submarine That Might Save America

To counter the glut of 2:1s, Mr Thomas recommends sub-dividing that class of degree even further, to recognise the "very good but not quite first-class" students.

BBC: NEWS | UK | Education | Degree grades 'in need of update'

And within this class I am specifically refering to the sub-category known as hustlers today.

FORBES: Entrepreneurs are the New Labor: Part I