It is important for everyone to learn English well in our rapidly developing world.

在这个迅速发展的世界里，对每个人来说，学好英语是非常重要的。

The harder you work at it, the contribution you make to protecting the environment, the world will become much more beautiful.

如果每个人都为保护环境做出贡献，世界会变得更加美好。

But for me, I would rather think of the matter in... way.

至于我，我宁愿以……的方式来看待这一问题。

Any parent should place considerable emphasis on their children to keep the balance between play and study. An old saying goes: All work and no play makes Jack a dull boy.

任何家长都应非常重视保持孩子在学习与玩耍的平衡，正如那句老话：只工作，不玩耍，聪明的孩子会变傻。

In the sixth grade, students are expected to have a good grasp of English writing skills. Writing compositions in English is an important aspect of language.

在六年级，学生应掌握良好的英语写作技能。用英语写作文是语言学习的一个重要方面。

Words must be believed, deeds must be done.

言必信，行必果。

A journey of a thousand miles begins with one step.

千里之行，始于足下。

Take a break.

休息一下。

Do some exercise.

做些运动。

Have a good time.

玩得开心。

Go to bed.

睡觉。

Watch TV.

看电视。

Play a game.

玩游戏。

Listen to music.

听音乐。

Go shopping.

去购物。

Have a snack.

吃点小吃。

这些句子涵盖了不同的主题和表达方式，适合六年级学生在科普版英语下册的作文中使用。希望这些句子能帮助你在写作中更好地表达自己的想法。