Database Principal " is a core subject for computer science . "

Dynamic has both a lay and a technical definition.

动力既有通俗的概念也有专业的概念.

As students of English we must master the English language.

作为英语专业的学生,我们必须很好地掌握英语.

I'm a professional and I have to conduct myself in a professional manner.

我是专业人士，必须以专业的态度行事。

LL : Yes, having a bum knee or leg is very common, particularly among former professional athletes.

就是啊,这种伤害对职业运动员来说都是常见的.我倒是很惊讶那些美式足球队员, 打起球来横冲直撞, 居然还能走路.

Used for testingpilling of all kinds of fabrics in circle track.

用于各类织物作圆轨迹法起毛起球试验.

I can hit ball straight during practice, but not during the game.

发球时,运动员要把球向上直线抛起,球须脱离手掌, 然后球必须一次击出.

He took his bat for the third and final time that game.

他在比赛中第三次拿起球棒,这也是最后一次.

Touch the ball. Pick up the ball. Come and play with me.

触摸球. 捡起球. 来和我一起玩.

The new basketball player is afraid of nothing when playing.

新队员打起球来没什么忧虑.

The tackled player carrying the ball must immediately play the ball.

带球的选手必须立刻运起球来.

His play sometimes tempted death.

他打起球来有时真像玩命.

Some dogs quickly learn the difference between unwanted people and friends.

有一些狗很快就学会了辨识主人讨厌的人或朋友.

That girl is a very unpleasant cup of tea.

那女孩是个非常讨厌的人.

Don't make a nuisance of yourself, sit down and be quiet!

别做让人讨厌的人, 坐下来保持安静.

I don't understand how can you stick with these annoying people.

我不明白你怎么会忍受得了这些讨厌的人.

Few of them were aware ( of ) what an unpleasant person he really was.

他们当中很少人知道他实际上是个何等令人讨厌的人.

She was a bloody onion tonight.

今晚上,她成了惹人讨厌的人.

I heartily sympathize with you.; I have every sympathy for you.

我很同情你。

Lithuania still commands considerable international sympathy for its cause

立陶宛的事业仍然拥有相当的国际支持。

When we hear that a couple live 11 time zones apart and can afford to come together only once in a long while, it ’ s natural to offer sympathy for the pain.

当听说一对情侣身处两地，彼此间隔11个时区，很久才能相聚时，我们很自然地会为他们的相思之苦表示同情。