invention可数吗event

John was full of invention ─ always making up new dance steps and sequences.

约翰有丰富的创造力——总能编出新的舞步和连续舞步。

Fax machines were a wonderful invention at the time.

传真机在当时是一项了不起的发明。

This story is apparently a complete invention.

这个故事显然完全是虚构的。

His invention was not commercially successful.

他的.发明从赢利角度看并不成功。

It's been a tricky business marketing his new invention

推广他的新发明一直是件棘手的事情。