The competition is open to both amateur and professional photographers.

You are a professional, but I am a amateur.

你是专业的, 我是业余的.

You are a professional, but I am an amateur.

你是专职的, 我是业余的.

Any topic assigned to them is certain to receive careful, professional scrutiny.

交给他们的任何题目必然会得到仔细而内行的研究.

She is a real professional.

她真内行.

To her expert eye, the painting was terrible.

以她内行的眼光看, 这幅画糟透了.

The professionaI guy in this fieId just can't be reached these days.

精于此道的专业人士这几天还到不了.

You need a professional to sort out your finances.

你需要专业人士替你管理财务.

Those who decide to take on teaching as a career need lots of patience.

决定以教书为职业的人需要很多耐心.

In a bizarre profession anything which belongs to an everyday routine gains great values.

从事不寻常职业的人,日常生活中任何一件极平常的事物对他都具有不平凡的价值.

He soon came to revise his opinion of the profession.

他很快就改变了对这个职业的看法。

Research is the corner-stone of the profession.

研究是这一职业的基础。

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

数据库原理是 计算机专业 的一门核心课程.

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.