He testified under oath that he had not stolen the bike.
他发誓作证他没有偷那辆自行车。
To state or affirm in a deposition or by affidavit.
宣誓作证通过宣誓或发誓声明或证实
To swear falsely;commit perjury.
作伪证发伪誓，作伪证
Before giving evidence you have to swear an oath.
在作证之前你得先发誓。
commit perjury
犯伪证罪, 发假誓
The clause in an affidavit naming the place where it was sworn to.
宣誓地条款宣誓书中指明宣誓作证地点的条款
Promised to reorganize the federal bureaucracy.
发誓整顿联邦官僚作风
swear [make, take] an affidavit
<证人> 宣誓不作伪证之口供书
The witness deposed that he had seen the accused steal the car.
证人宣誓作证说，他看见被告偷车。
make an affidavit
(在法官或公证人面前)写下(宣誓)证词，立下宣誓书，作书面保证
A witness swears by the Bible that he will tell the truth.
证人对着圣经发誓保证据实直言。
promise solemnly to give (support,etc);give(one's word,honour,etc)as a pledge
保证给予（支持等）;以（誓言、名誉等） 作担保
all the witnesses have Been sworn.
所有的证人都作了法庭宣誓
I have sworn to obey the laws, and I cannot forswear myself
我已宣誓服从法律，我不能作伪证。
He swore treason against his friend.
他宣誓对他的朋友犯有叛国罪作证。
Testimony under oath, especially a statement by a witness that is written down or recorded for use in court at a later date.
宣誓作证宣誓作证，尤指通过写下的证词或记录的形式作出的在今后法庭上使用的证词
The judge reminded the witness that he was still under oath.
法官提醒证人,他是发过誓的。
A witness under oath is expected to tell the naked truth.
希望发过誓的证人讲出真相来。