Comets have been seen the sky since antiquity.

彗星以来出现在天空中。

Humans have used biofuels since ancient times.

类以来使用生物燃料。

America's always been a country full of immigrants.

美国以来个移民国家。

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

中国以来茶叶生产大国。

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

疟疾以来类的致命问题。

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

探索宇宙以来类的梦想。

Europeans had been holding Harvest festivals since the ancient times.

欧洲以来会举行丰收。

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

以来，我们便一直留存该活动。

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

以来，类都在寻求长生不老。

This is a belief held by Chinese since ancient times.

这中国以来持有的信仰。

They have hereditary forms of slavery in India.

“以来，印度个奴隶制国家。

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

月桂叶以来神话传说中的特色。

Cats haven't always been our pets.

猫并非以来我们的宠物。

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

真实事情 当然，以来有真实存在的阴谋。

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，讲讲类以来的进步。

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

它以来存在，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.

这些螨虫以来和我们在一起，但直到1965年才被发现。

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

以来，类和彗星之间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.

这句话以来被用来描述埃及文明，今天仍然如此。