In the 20th century, mankind has invented many useful things for us, such as: telephone, computer, TV..., these items make modern people's life convenient and colorful.
在20世纪，人类已经发明了许多我们有用的东西，如：电话，电脑，电视…，这些项目使现代人们的生活带来方便和丰富多彩。
In the 20th century, mankind has invented many useful things for us, such as: telephone, computer, TV..., these items make modern people's life convenient and colorful.
在20世纪，人类已经发明了许多我们有用的东西，如：电话，电脑，电视…，这些项目使现代人们的生活带来方便和丰富多彩。
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