1.
Don't take matters into your hands; make your application through the usual channel.
不要擅自行动，还是通过正常渠道提交申请。
2.
Civil air defense evacuation must be carried out in accordance with the order issued by the State. No organization may go into action without such order.
人民防空疏散必须根据国家发布的命令实施，任何组织不得擅自行动。
3.
To take part in a private military action in a foreign country.
擅自对外侵略在外国参与一项秘密军事行动
4.
walk in, help unbidden
擅自进入、主动帮助
5.
leave without notice,ie without giving the agreed amount of warning
擅自离去（未履行应预先通知之约）.
6.
He acted without reference to his superior.
他无视他的上司，擅自行事。
7.
Leave without notice, ie without giving the agreed amount of warning
擅自离去（未履行应预先通知之约）
8.
The records of the meeting had been tampered with.
会议记录已被人擅自改动.
9.
He is stronger on rhetoric than on concrete action.
他很擅长花言巧语，却没有实际行动。
10.
The coupon torm, damaged or altered without permission is invalid.
*本券自行撕角，缺损或擅自更改内容均视作无效。
11.
"He helped with cutting up and studying dead animals, and soon found that this was what he liked doing and was good at."
亨特帮助哥哥解剖、研究死了的动物。不久他发现这一行当正是自己喜欢做又擅长做的。
12.
Changing the usage of leasing prescribed in the contract or carry on illegal activities.
擅自改变本合同规定的租赁用途，或利用该房屋进行违法违章活动的。
13.
Whichever entity or individual discretionally establishes a publication distributing entity or discretionally engages in publication distributing business without approval,
未经批准，擅自设立出版物发行单位，或者擅自从事出版物发行业务的，
14.
I don't like the cool way you used my bicycle without my permission.
我不喜欢你这种擅自使用我的自行车的自作主张的行为。
15.
Making an appointment conforms the rule that early book early play,and strictly forbid transferring the fixed group.
预约遵循先订先得原则，严禁擅自调动已订组。
16.
The migrant workers squatted on the unused farm.
流动工人们擅自占用了未曾使用过的农
17.
Whichever entity or individual discretionally establishes a market for wholesale of publications without approval, shall be considered to discretionally establish a publication distributing entity for punishment.
未经批准擅自设立出版物批发市场，按照擅自设立出版物发行单位处罚。
18.
I do not like the cool way you used my bicycle without my permission.
我不喜欢你这种擅自使用我的脚踏车的自作主张的行为。