People began to make robots about several hundred years ago.
人们开始约数百年前开始使用机器人。
It's acknowledged that several hundred years ago Earth became much warmer.
现已承认地球在几百年前变得更暖。
Several hundred million years ago, it was a sea here, under which there were accumulated limestone layers a few thousand meters thick.
几亿年前，这里还是一片大海，海底沉积了几千米厚的石灰岩。
The Pleiades cluster consists of several hundred stars that were born from the same cloud of gas and dust over 100 million years ago.
昴宿星团形成于一亿年前，由在同种气体云和尘埃中诞生的几百颗星星所构成。
Emerged only several hundred thousand years ago, the Himalayas are the youngest mountains on the earth. Nowadays they are still growing!
喜马拉雅山是地球上最年轻的山脉，因为它真正成为雄伟的山体仅有几十万年的历史，而且现在还在不断增高呢！
Emerged only several hundred thousand years ago, the Himalayas are the youngest mountains on the earth. Nowadays they are still growing!
喜马拉雅山是地球上最年轻的山脉，因为它真正成为雄伟的山体仅有几十万年的历史，而且现在还在不断增高呢！
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