Comets have been seen the sky since antiquity.

彗星古以来就出现在天空中。

Humans have used biofuels since ancient times.

人类古以来就使用物燃料。

America's always been a country full of immigrants.

美国古以来就是个移民国家。

China has been a big tea-producing country since ancient times.

中国古以来就是茶大国。

Malaria has been a deadly problem for humans since ancient times.

疟疾古以来就是人类的致命问题。

Exploring the universe has been mankind's dream since ancient times.

探索宇宙古以来就是人类的梦想。

Europeans had been holding Harvest festivals since the ancient times.

欧洲人古以来就会举行丰收。

And this is something that has been going on with our people since time Immemorial.

古以来，我们便一直留存该活动。

Since the dawn of history, man has been searching for immortality.

古以来，人类都在寻求长不老。

This is a belief held by Chinese since ancient times.

这是中国人古以来就持有的信仰。

They have hereditary forms of slavery in India.

“古以来，印度就是个奴隶制国家。

Bay leaves have featured in myth and legends since ancient times.

月桂古以来就是神话传说中的特色。

Cats haven't always been our pets.

猫并非古以来就是我们的宠物。

The real thing. Of course, there have been some real conspiracies through the ages.

真实事情 当然，古以来就有真实存在的阴谋。

Let's stick with this history theme and talk about the progress of humanity throughout the ages.

让我们继续历史主题，讲讲人类古以来的进步。

It has been around since Ancient times and is also known as the Method of Loci.

它古以来就存在，也被称为基因座法。

The great inviolate place had an ancient permanence which the sea cannot claim.

这片未遭蹂躏的原野拥有一种古以来永久不变的连大海也不具备的特性。

These mites have been with us since time immemorial, but they weren't discovered until 1965.

这些螨虫古以来就和我们在一起，但是直到1965年才被发现。

Throughout history, we've had a rather complex relationship with comets, as our science correspondent reports.

古以来，人类和彗星之间就存在着一种十分微妙的关系。本台科学记者详细报道。

These words have been spoken about the Egyptian civilization ever since time immemorial and they still remain true today.

这句话古以来就被用来描述埃及文明，今天仍然如此。