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Pinyin tone marking

The Earth is the third planet from the Sun and the only planet known to have life. The Earth formed about 4.5 billion years ago. It is one of four rocky planets in the Solar System. The other three are Mercury, Venus, and Mars.

Dihqiur shih dih-3 kaohjihn Taihyarng d xirngxing, weiryi yiizhi yoou shengmihng, yue 45 yih niarn qiarn xirngcherng; shih Taihyarngxih 4'g yarnshir xirngxing zhiyi, lihngwaih 3'g shih Shuiixing, Jinxing her Huooxing.

The huge attractive force of the Sun makes the Earth to move around the Sun, it is called revolution. The Earth also moves around itself, it is called rotation. The time for one revolution is called a year, for one rotation is called a day.

Taihyarng d juhdah yiinlih shii Dihqiur weirraao Taihyarng yuhnxirng, jiaohzuoh gongzhuahn. Dihqiur yee weirraao zihzii yuhnxirng, jiaohzuoh zihzhuahn. 1-cih gongzhuahn d shirjian jiaohzuoh 1 niarn, 1-cih zihzhuahn d jiaohzuoh 1 rih.

The attractive force of the Earth makes the Moon to move around the Earth. The Moon is the only satellite of the Earth, it reflects sunlight to the Earth and its attractive force affects the tides of the Earth.

Dihqiur d yiinlih shii Yuehqiur weirraao Dihqiur yuhnxirng. Yuehqiur shih Dihqiur d weiryi weihxing, ta faansheh yarngguang zhih Dihqiur, ta d yiinlih yiingxiaang Dihqiur d chaorxi.

The Earth is the only planet in the Solar System that has a big quantity of liquid water. About 70% of the surface of the Earth is covered by oceans. Because the Earth has water, it has living things.

Dihqiur shih Taihyarngxih weiryi yoou dahliahng yehtii shuii d xirngxing, ta d biaaomiahn yue 70% shih haaiyarng. youryur yoou shuii, Dihqiur jiuh yoou shengwuh.