这种用途的透镜有各种不同的名称：放大镜，简单放大镜或简单显微镜。

The lens so used is referred to variously as a magnifying glass, a simple magnifier or a simple microscope.

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早在公元前7世纪，人们就利用简单的放大镜将阳光集成一束，利用热量点燃木材。

As early as the 7th century B.C., people used simple magnifying glasses to concentrate the light of the sun into beams so hot they would cause wood to catch fire.

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早在公元前7世纪，人们就利用简单的放大镜将阳光集成一束，利用热量点燃木材。

C., people used simple magnifying glasses to concentrate the light of the sun into beams so hot they would cause wood to catch fire.

youdao

早在公元前7世纪，人们就利用简单的放大镜将阳光集成一束，利用热量点燃木材。

C., people used simple magnifying glasses to concentrate the light of the sun into beams so hot they would cause wood to catch fire.

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