Actually, the seeds don't retain the power to germinate for very long.

事实上，种子不能长时间保持发芽的能力。

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The boat was so small that no one believed it could stay afloat for very long.

VOA: special.2010.03.06

Because this is something we've been working for very long time.

因为这是我们努力很久的目标。

哈佛公开课 - 幸福课课程节选

You see lots of people in ridiculous shoes that you couldn't possibly walk in for very long

你看到很多人穿着滑稽鞋子，根本不可能走很长的路的鞋子，

上东区的氛围 - SpeakingMax英语口语达人

He developed a habit of running away, though never very far, or for very long.

NEWYORKER: Neptune��s Navy

Anyone who thinks they are comfortable in the England 32 won't be there for very long.

BBC: Martin Johnson backs Steve Borthwick for England return

Locals see it once or twice a year, but never for very long.

BBC: Cruising into Gold Rush country