1. stray /streɪ/
e.g. The war has caused the number of stray animals to double. 战争致使流浪动物的数量翻了一番。
e.g. We have given a home to a number of strays.
e.g. She strayed from the group and got lost. 她脱离队伍后迷路了。
e.g. She never strayed from the path her parents envisioned for her. 她从未偏离父母替她设想的道路。
2. captivity /kæp'tɪvɪtɪ/
e.g. A zoo is a place where live animals are kept in captivity for the public to see. 动物园是圈养动物以供公众观看的场所。
搭配: be kept / bred/ held in captivity
e.g. If it is successful, captive breeding could restore the population to 200 in seven years.
雅写作话题探讨过动物园存在的意义: a good place or cruel place?
从积极方面来说：Captive breeding protect against a species going extinct.
e.g. Invasive species arrive in new habitats, outcompeting the natives. 入侵物种在新的栖息地中战胜原生物种。
e.g. Invaders will upset the ecosystem.
注：upset: 打乱; 搅乱
Idiom: upset the/sb’s apple cart 破坏某人的计划；打乱某人的步骤:
e.g. Tim was about to study abroad but a sudden outbreak of pandemic upset his apple cart.
4. sanctuary /'sæŋ(k)tjʊərɪ/
近义词：reserve; conservation area
e.g. The donkey sanctuary takes care of donkeys that have been badly treated.
The sanctuary was established specifically to protect the Asiatic lion. There are now around three hundred Asiatic lions in India and almost all of them are in this sanctuary.