Soaring birds and gliding wings were keys to the design of the first successful human-powered aircraft.

She is very superficial and lacks depth

她为人肤浅，缺乏深度。

It's a superficial book.

这是一本立论肤浅的书.

You're too superficial to appreciate great literature like this.

你太肤浅,无法欣赏这类文学巨著.

He flings words at the reader, yet his sentences are empty without any meaning.

他对读者加以指责, 可他的文字空洞无物.

These instructions may, at first, seem abstract . Do not let this disturb you.

这些训示起初可能看来空洞无物,别因此困惑.

There's a lot of padding in this novel.

这部小说有大量空洞无物的内容.

Never tilt the chair backward on two legs.

决不能把椅子往后翘,以致使椅子前面两条腿悬空.

Vortex-excited vibration induced by fluid takes place on the underwater suspended pipelines.

单跨和多跨水下悬空管线在水流作用下发生涡激振动.

One of his feet was on the wooden floor, the other was in space.

他的一只脚踩在地板上, 另一只脚悬空.

Let's deal with the matter now ; It's hung in the air too long.

这件事不能老悬空, 要抓紧解决.

Stones are hard, water is wet, objects unsupported fall towards the earth's centre.

石头毕竟坚硬, 水毕竟潮湿, 悬空的物体毕竟落向地心.

For a moment he hung free.

他的身体悬空片刻.

The cavity in the tower is filled with high-strength concrete.

在塔内的空洞部分填满 高强 混凝土.

He wondered what images moved through the empty rooms of her mind.

他不知道这究竟是什么样的思绪在那空洞的头脑中转动.

This takes " assumption of defense " off the table.

如此得来的 “ 防御设想 ” 不至于纸上谈兵.

I have many armchair experts, I need generals.

我有许多纸上谈兵的专家, 我需要将军.

My fat IT is a hopeless armchwaterdrop quarterago.

我爸爸是唯一没救了的纸上谈兵的人.

That speech was divorced from reality and was mere paper talk.

那个讲话脱离实际,是纸上谈兵.

It is a powerful lesson of application being superior to mere knowledge.

这是宝贵的一课,教我们实际经验比纸上谈兵更有用.

This textbook account puts expectations at the heart of the inflation process.

这段纸上谈兵是把通胀的预期作为通胀过程的核心.