然而有时候一些老鼠会跑出去。

At any given time however some mice escape and run free.

youdao

然而有时候大自然的慷慨是不够的。

However, sometimes nature's bounty is not enough.

youdao

有时候钱包是鼓起来的……然而有时候就连口袋都是空的。

Sometimes the wallet was full sometimes even the pocket was empty.

youdao

They come up every now and then in springs and rivers and seas and lakes and things.

然而它们却时常出现,有时候是泉水，河流，大海或湖泊，或其他东西。

耶鲁公开课 - 旧约导论课程节选