They turn the light on at dark.
他们天黑时开灯。
Production of the sleep hormone melatonin begins at dark.
睡眠荷尔蒙褪黑素在夜间开始分泌。
The night was dark and quiet; my blood ran cold when I heard a strange noise outside at dark night.
夜晚黑暗而宁静；漆黑夜色中听到外面有奇怪的声响，我感到毛骨悚然。
The hunters camped by the lake at dark.
天黑时，猎人们在湖边宿营。
The bar street has many customers even at dark nights.
酒吧一条街的生意在深夜都很好。
At dark impermanent just pardoned to quit of, the apartment door rang to get up.
就在黑无常刚刚告退之时，宿舍门响了起来。
A man hunted for a fox and finally lost himself in the forest. He walked around anxiously. At dark he met an old lady with white hair.
一个人在森林里追赶一只狐狸后来迷了路。他焦急地四处乱窜。黄昏时他遇到了因为满头白发的老太太。
The animation uses a "hot metal" colour scale that begins at dark red and progresses through orange and yellow to white at the highest levels of activity.
影片里用色线标出了活动等级：由深红开始，逐步过渡桔红，再到黄色，进而显成白色这一最高等级。
Night frogs are extremely hard to find, coming out only at dark and during the monsoon season, living either in fast-flowing streams or on moist forest ground.
夜蛙往往极难发现，他们生活在水流湍急的溪流中或者潮湿的森林地带并且仅在雨季的夜间才会出来活动。
I can't see her at all, cos it's too dark.
天太黑，我根本看不见她。
He shivered at the thought of the cold, dark sea.
那寒冷黑暗的大海，他想想都吓得发抖。
It was cold and dark when I woke at 6:30.
我6点30分醒来时，天又冷又黑。
He used the same cinematographer, Owen Roizman, to create a dark, intense atmosphere which was very un-American at the time.
他使用了同一个的电影摄影师，欧文•鲁伊兹曼，创造了一种当时美国人很不习惯的阴暗紧张的氛围。
At night, the dark streets become menacing.
在夜晚，漆黑的街道变得阴森森的。
Access was gained to these shops through the small alleyway at the back of the properties—it's dark and as you can imagine, no one saw the thief or thieves in action.
通过房子后面的小巷子可以进入这些商店，那里很黑，你可以想象不会有人看到小偷的行动。
In the old days at home the Neverland had always begun to look a little dark and threatening by bedtime.
在以前的日子里，缥缈国在睡觉前总是显得有点阴暗和吓人。
She arrived at the meeting as much in the dark as everyone else.
她到会时与其他人一样毫不知情。
She looked at them with dark staring eyes.
她那双深色的眼睛专注地看着他们。
The eyes behind the lenses were dark and quick-moving, taking in everything at a glance.
镜片后的眼睛黑黑的且快速转动着，一眼就能看清一切。
When at last they awoke, it was already dark night.
当他们终于醒来时，天已经黑了。
A leatherback may be able to pick up some body heat by basking at the surface; its dark, almost black body color may help it to absorb solar radiation.
棱皮龟可以通过在水面上晒太阳来为身体获取热量；深色近乎黑色的身体颜色可以帮助它吸收太阳辐射。
The dusk light was failing and the interior of the pickup was dark but she knew the occupant was staring at her.
黄昏的光线逐渐暗淡下来，皮卡内黑漆漆的，但她知道占有者一直在盯着她。
They do chores at home and hopefully manage to find some time to study before it gets dark.
他们在家做家务，希望能在天黑前找到时间学习。
They don't meet in the daytime; they meet either early before light, at dawn, or after dark, at night.
他们不在白天见面；他们要么在黎明前相遇，要么在黄昏后相遇。
Look at the dark sky, it's going to rain.
看这黑暗的天空，要下雨了。
It is through widespread loss of memory that civilizations are at risk of falling into a dark age.
正是由于广泛的记忆丧失，文明才有陷入黑暗时代的危险。
Lawmakers and regulators are slowly starting to address the ambiguity around dark patterns, most recently at the state level.
立法者和监管者正慢慢开始设法厘清黑暗模式相关法律的模糊之处，其最近行动开展于州级层面。
It was dark at the time, and the traffic was light.
当时天色阴暗，路上的车辆很少。
Suspended on their stilts, the actors remove their masks and reveal their off-white faces, staring terrified at a sunless sky, dark clouds congregating.
演员们被吊在高跷上，他们摘下面具，露出他们苍白的脸，惊恐地盯着没有阳光，乌云聚集在一起的天空。
Suspended on their stilts, the actors remove their masks and reveal their off-white faces, staring terrified at a sunless sky, dark clouds congregating.
演员们被吊在高跷上，他们摘下面具，露出他们苍白的脸，惊恐地盯着没有阳光，乌云聚集在一起的天空。
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