1.
one who is away or absent without leave.
擅自离去或擅离职守的人。
2.
breach of arrestment
擅自处理已查封的财产
3.
crash the party
擅自闯入集会, 不请而至
4.
No trespassing, ie as a warning sign.
严禁擅自进入（告示用语）.
5.
Please excuse my intrusion.
请原谅我擅自进来。
6.
Someone is tampering with my mail.
有人擅自拆了我的邮件。
7.
She's gone off with my book.
她把我的书擅自拿走了。
8.
She took the liberty of using your typewriter while you were away.
她擅自用你的打字机。
9.
The squatters were ordered to vacate the premises.
擅自占房者被勒令迁出.
10.
remove from its proper place without permission or by mistake
擅自取走, 错拿, 偷窃
11.
The children entered the concert without permission.
小朋友擅自进入音乐会。
12.
(7) transferring solid waste out of the administrative area of a province, autonomous region or municipality directly under the Central Government for storage and treatment without authorization.
（七）擅自转移固体废物出
13.
walk in, help unbidden
擅自进入、主动帮助
14.
He squatted in an empty house.
他擅自在一座空屋居
15.
on one's own authority
凭一己之意,凭独断,擅自
16.
(military) having deserted your post or station without leave.
（军事）擅自放弃了自己的岗位或者职责。
17.
Whoever violates state regulations and installs or uses radio stations (transmitters), occupies frequencies without authorization, and refuses to stop using them after being ordered to do so,
违反国家规定，擅自设置、使用无线电台(站)，或者擅自占用频率，
18.
Occupation of property ( such as by squatter ) contrary to the rights of the real owner
违反真正所有人的权利擅自占有财产，如擅自占地者