It takes years to gain a mastery of Japanese.

掌握日语要花几年时。

Russian is a diffcult language to master.

语是一种难掌握语。

I’m trying to come to grips with Russian grammar.

我正在努力掌握语语法。

Can you be master of your destiny?

你能掌握自己命运吗?

The elements of physics are difficult to grasp.

物理原理是很难掌握。

He has a great number of English idioms at command.

他掌握了大量英语成语。

The information in my possession is strictly confidential.

我掌握情报是绝对机密。

The teacher quizzed the pupils on the multiplication tables.

老师测试了学生们对乘法表掌握。

His timing when he volleys is so good.

他截击空中球时机掌握得很好。

The children progressed in the acquisition of basic skills.

孩子们在掌握本技术方面取得了进步。

The bowler judged it well, timing the ball to perfection.

投球手判断准确，对球速掌握恰到好处。

We are on the scent of an important discovery.

我们已掌握了一条可能导致重要发现线索。

The basic vocabulary of a language is those words that must be learnt.

一种语本词汇即必须掌握词语。

It was a difficult concept to grasp, but Sam latched on very quickly.

那是个难掌握概念，但萨姆很快就理解了。

According to facts in my possession he can't possibly be guilty.

根据我所掌握事实, 他是不可能有罪。

It's not difficult to understand this world when you mastered the internal relations of things.

掌握了事物内部联系你就不难理解这个世界。

To learn the process of making barbola fish.

使学生了解剪贴画步骤，掌握剪贴画制作。

They will be examined on their knowledge of Spanish.

他们将参加考试, 检查他们掌握西班牙语情况。

The indication of expectant treatment should be taken restrictively in slight cases.

对病情轻,表现不典型病例,必须严格掌握保守治疗指征。

To master the regulation of thyroid hormone secretion including hypothalamas-pituitory-thyroid axis，nervous regulation and the autoregulation.

掌握甲状腺功能调节，包括下丘脑—腺垂体—甲状腺轴和自身调节。