这令人担忧，因为长期使用智能手机会损害儿童的视力、颈椎甚至大脑。

This is worrying, as long-time use of smart phones harms children's eyesight, cervical vertebrae and even the brain.

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据估计，1900万儿童的视力受到损害。

An estimated 19 million children are visually impaired.

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最后但并非最不重要的，看太多电视对儿童的视力不好。

Last but not least, watching TV too much is bad for children's eyesight.

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