Will you travel by sea or by air?

你们乘船去，还乘飞机去？

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.

这些展品从全国各过来的。

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

它们也不包括被气污染所掩盖的气候变暖。

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

如今，搜寻搜救的首选方式。

But after five years of air strikes by a U.S. led coalition of countries, fighting on the ground by local forces and intervention by militaries around the world.

但在美国领导的国家联盟进行了长达五年的袭之后，当部队在面作战，世界各的军队也进行了干预。

Instead, heat moves through air by convection.

相反，热量通过对流在气。

Two billion children are currently affected by air pollution.

目前，有20亿儿童正遭受气污染的影响。

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

您要寄邮还平邮？

It can also be done by air using planes, helicopters and now drones, though experts say these methods are not as effective as manually planting trees.

也可以通过飞机、直升机和现在的无人机在完成，尽管专家说这些方法不如人工种植有效。

We're talking roughly 400 million rail passengers and that doesn't count the tens of millions who travel by air or use other forms of transportation.

大约有4亿铁路旅客，这还不包括数千万乘坐飞机或使用其他交通工具的旅客。

I used to travel by air a great deal when I was a boy.

我在幼年的时候，曾多次乘飞机旅行。

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

每年有成千上万的人乘飞机游览峡谷。

When normal flights began again, many people were too afraid to travel by air.

正常飞行开始时，许多人害怕乘飞机旅行。

We are sending you our sample by air parcel post.

我们正要用邮包寄我们的样品给你们。

You can now easily access Angkor Wat by air, and it has hotels nearby.

大家现在可以乘飞机轻松到达吴哥窟，并且附近还有酒店。

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

每年有25‰的死亡原因气污染。

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。

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

金鱼用鳃吸进水里的气的。

Its ability to carry many passengers meant more people could travel by air.

它能够搭载许多乘客，这意味着更多的人可以乘坐飞机旅行。