Before the sun sets, we need to get to the top of the mountain.

在太阳落山之前，我们必须到达山顶。

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Small enterprises are suited to top filling in the gaps in the manufacture by large enterprises of complete sets of equipment.

(小企业为大企业)协作配套。

《新英汉大辞典》

Hastings, a professor in the UC Davis Department of Environmental Science and Policy, is one of the world's top experts in using mathematical models (sets of equations) to understand natural systems.

加州大学戴维斯分校环境科学与政策系教授黑斯廷斯，是世界上利用数学模型(方程组)来理解自然系统的顶级专家之一。

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Despite its acoustically friendly elements, Ms. Racette and Ms. Clayton wanted their house to be very different from the over-the-top opera sets in which they spend much of their time.

WSJ: A Diva's Desert Hideaway

The Kickstarter campaign, which ends May 24, will go to fund things like more musicians, better sets and top-notch lights.

WSJ: 'American Psycho' creators turn to crowd-funding

Reid of Nevada is the top Senate Democrat, who sets the chamber's legislative schedule.

CNN: Obama still backs new gun ban; top senator less certain