New Words：

develop [di'veləp] v. 发展；开发；(使)成长；壮大；发育

Sample Sentences：

The child is developing normally.
Modern music was first developed in Italy.
Warm rains and summer suns develop the plants.
We must do our best to develop the national economy.
Humans are the only animals to have developed speech.

normal ['nɔ:məl] adj. 典型的；正常的；一般的
normally ['nɔ:məli] adv. 通常；正常地；正常情况下；平常地

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