verb
surround
adjective
with walls, etc. all around （用墙等）围住的，封闭的
Do not use this substance in an enclosed space.
切勿在封闭空间使用此物质。
(abbreviation encl.) sent with a letter, etc. 随函附上的；附上的
Please complete the enclosed application form.
请填好随函所附的申请表。
Please find enclosed a cheque for £100.
随函附上 100 英镑支票一张。
(of religious communities 宗教团体) having little contact with the outside world 与外界隔绝的