No student is to use the bathroom unaccompanied by a teacher.

在没有老师陪伴的情况下，任何学生不得使用盥洗室。

There had fallen a great deal of rain, but unaccompanied by lightning.

下了很大的雨， 但没有伴随着闪电。

A running gag unaccompanied by laughter, Your Honor.

他们讲这笑话都不笑的 法官阁下。

But they are worried that not enough is being done to help children who have already arrived in Europe, many of them unaccompanied by adults.

但是议员们担心对那些已经抵达欧洲儿童的帮助不够，他们很多人都没有家长的陪伴。

Today, roughly half the world's refugees are children, some of them unaccompanied by an adult, a situation that makes them especially vulnerable to child labor or sexual exploitation.

今天，世界上大约一半的难民是儿童，其中一些没有成年人陪伴，这种情况使他们特别容易成为童工或性剥削。

His gaze at the ramparts was not that of a curious or idle spectator; but his looks wandered from point to point, denoting his knowledge of military usages, and betraying that his search was not unaccompanied by distrust.

他注视城墙的目光并不是好奇或懒惰的旁观者；但他的目光四处游荡，表明他对军事用途了如指掌，并表明他的寻找并非没有疑虑。