Will you travel by sea or by air?

你乘船去，还是乘飞机去？

Hi, Kevin, do you often travel by air?

嗨，凯文，你经常坐飞机旅行吗？

The exhibits were delivered by air from all over the country.

这些展品是从全国各地空动过来的。

Two billion children are currently affected by air pollution.

目前，有20亿儿童正遭受空气污染的影响。

The survey was conducted by air.

该调查是在空中进行的。

Nor do they include already locked in warming hidden by air pollution.

它也不包括被空气污染所掩盖的气候变暖。

We are sending you our sample by air parcel post.

我正要用邮包寄我的样品给你。

Twenty-five thousand deaths per year are caused by air pollution.

每有25‰的死亡原因是空气污染。

We hear some emergency relief is getting through by air.

我了解到，一些紧急救援物资正通过飞机送往灾害发生地。

Rescuers are bringing in supplies by air, sea and land.

救援人员正从海陆空各方运来补给。

Unvoiced consonant sounds are made by air pushing through your mouth.

清辅音是空气通过你的嘴巴进行发音的。

It claimed several missiles were shot down by air defense systems.

它声称有几枚导弹被防空系统击落。

Nowadays, the first way someone will search for you is by air.

如今，空中搜寻是搜救的首选方式。

Do you want to mail it by air or by ordinary mail?

您是要寄空邮还是平邮？

Hundreds of thousands of people see the canyon by air each year.

每有成千上万的人乘飞机游览峡谷。

The fish draws this air out of the water by its gills.

金鱼是用鳃吸进水里的空气的。

After visiting Hangzhou, I'll go straight to Hong Kong by air.

游览过杭州后，我将坐飞机直接飞往香港。

The United States has announced new requirements for foreign nationals arriving by air.

美国宣布了对乘飞机抵达的外国公民的新要求。

And the government forces blocked inside could only be supplied by air.

而被封锁在内部的政府军只能通过空中补给。

Some three million people traveled by air in the U.S. over the weekend.

周末，美国大约有300万人乘飞机旅行。