I'm going take the dog down to the vet's and have her put to sleep.

我打算把这只狗带到兽医那儿，让她无痛苦地死去。

《柯林斯英汉双解大词典》

An officer then shot an arrow to put it to sleep.

军官随后向它射了一箭，让它昏过去了。

youdao

One night, my sister wanted to sleep in the room to see why he woke up screaming every time we put him in his crib fast asleep.

一天，我姐姐打算睡在那个房间，想知道为什么每次我们把他放在婴儿床上熟睡时，他就会尖叫着醒来。

youdao

Experts say if you decide to put your baby to sleep with a bottle, give only water.

VOA: special.2009.03.11

Probably the best answer is our body is worn out during the day and sleep is necessary to put it back into shape.

最佳的答案应该是,一天下来，我们的身体已经疲惫了,有必要进行睡眠，以恢复状态。

耶鲁公开课 - 心理学导论课程节选

First,we'll put you to sleep when we do all this procedure.

首先会让你进入睡眠状态。

耶鲁公开课 - 死亡课程节选

The 10-year-campaign to encourage mothers to put their babies to sleep on their backs have been widely credited for this.

BBC: 'Lowest ever' infant death rate

About 2, 500 babies die from SIDS each year, down from about 4, 000 per year in 1992, in part due to campaigns urging parents to put infants to sleep on their backs.

WSJ: When a Cuddly Crib Puts the Baby in Danger

They had to be put to sleep.

BBC: Seven bailed after rabbits and ducks in Barry 'tortured'