He used a sharp stick to dig a hole four feet deep.

他用一个锋利的棍子挖了一个四英尺深的洞。

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He used computer simulations to explore what the solar system may have looked like some four billion years ago.

他利用电脑模拟来重现太阳系四十亿年前可能的样子。

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Mr Forse said he had already used some of the bread when he noticed "a dark-coloured object embedded in the corner of three or four slices".

此杯具男说当他发现这个“嵌在三四片面包一角的深色物体”时已经用了好几片面包了。 负责环境健康相关的人员到了他家取证。

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From 253 yards, he used a four iron to chase the ball down the length of the green and into the hole.

WSJ: Masters 2012: Bubba Watson Miracle Shot Lets Him Trump All Comers

Barrow, 60, is sticking to the formula he has used for nearly four decades: Pay some attention to the prospects for a company, just as a growth manager would, but don't buy unless it is trading at a low multiple of its earnings or book value.

FORBES: Keep the Faith

But recently he got serious about a light-blonde model that seemed to have a lot of potential to replace the guitar he's used for about four years.

NPR: Jason Vieaux Picks Out a New Guitar