They are usually nocturnal, becoming active at night, but they can also be crepuscular, which means they are active at dawn and dusk.

狮子通常是夜行性，夜间出来活动，但它昏和黎明时分时也很活跃。

It was the first time that sun rays, also known as crepuscular rays, have been viewed so clearly on Mars, said NASA.

美国航天局称，这是第一次火星上如此清晰地观察到太阳光线，也称为昏射线。

Cats are crepuscular, which means they’re most active at dawn and dusk.

猫是昏， 这意味着它黎明和昏最活跃。

Now these beautiful native owls are actually what we call crepuscular.

现这些美丽本土鸣叫猫头鹰实际上是晨昏性。

" Vestibule" " Crepuscular" " Flibbertigibbet" But the emperor said nothing.

“前庭” ，“昏” ，“轻浮” 但是皇帝什么也没说。

And Le Carre, like him, inhabits that crepuscular world.

而勒卡雷，与他相似，也栖身于那个朦胧、充满阴影、危与存性风界。

And if she is also, as we know, a crepuscular animal, You know, she's going to be out at dawn, she's going to be out in the evening, and she's going to be sleeping during the day.

而且，正如我所知，如果她也是一种昏动物，你知道，她会黎明时分外出，傍晚时分外出，白天则会睡觉。

Like bats and fireflies, elks are crepuscular, meaning they are most active in the low light hours of the early morning and late evening, when they like to graze in the high alpine meadows.

如同蝙蝠与萤火虫一般， 驼鹿是晨昏性动物，这意味着它清晨与傍晚光线较弱时最为活跃，喜欢这段时间里高海拔草甸上觅食。

These little crepuscular (it means active during twilight) critters will keep you company (and possibly keep you awake) while they play in their cage.

这些小昏（这意味着昏时活跃）小动物会笼子里玩耍时陪伴您（并可能让您保持清醒）。

There are countless wild species being negatively affected by our light pollution, whether they are nocturnal (active at night) or crepuscular (active during twilight).

有无数野生物种受到我光污染负面影响，无论它是夜间活动（夜间活跃）还是昏（昏时活跃）。

Cats are naturally crepuscular, and that word means that they're active at dawn and dusk.

猫天生是昏，这个词意思是它黎明和昏很活跃。