It is hardly surprising that something called dark energy is hard to study. It is important, though.

一种叫暗能的东西很难研究，这并不足为奇，尽管它很重要。

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It makes an extremely effective sight at the back of the border, where it'll need supports to keep it up, though it's equally smart against a dark-coloured fence or wall.

把它种在院子边上效果特别好，但在那里它需要有支架来保持直立，种在深色的篱笆或者墙边效果也同样好。

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Though no one has a good idea of what dark energy is, or why it exists, it is the force that appears to be counteracting gravity and causing the universe to accelerate in its expansion.

尽管没有人能较好申明什么是暗能量，或它为何存在，但它就是阿谁体现出抵消引力、导致宇宙加快膨胀现象的力。

youdao

At a recent performance at a New York jazz club, Harrell showed up looking trim in a leather jacket and sunglasses--even though it was a hot, dark summer night.

FORBES: Jazz, Schizophrenia And Side Effects

SLD, and though its tenure has not been marked by free-market zealotry, neither has it plunged Poland back into the dark ages.

ECONOMIST: Poland