Humans can not make progress without dreams.
没有梦想，人类就不能进步。
These students can not concentrate on their study.
这些学生不能集中精力学习。
Plants and animals can not live now on Mars.
植物和动物现在不能在火星上生活。
They can not live for long periods in cold weather.
它们不能在寒冷的天气中长时间生存。
"I can not play anymore," I said on the third day.
“我不能再玩了。”我在第三天的时候说。
Children who have malnutrition do not grow properly and they can not concentrate at school.
营养不良的儿童不能正常生长，无法在学校集中注意力。
Salt takes in plenty of water, so most bacteria can not live in a salty environment.
盐会吸收大量的水，所以大多数细菌不能在含盐的环境中生存。
Cindy can not cross the street.
辛迪不能过马路。
有些食物不能贮存。
I can not give the actual figures.
我不能举出实际数字。
我们不能下去。
You can not play table tennis by yourself.
你不能独自一个人打乒乓球。
We can not make heavy concession to the matter.
我们在这个问题上不能过于让步。
I have to inform you that we can not approve of it.
我不得不告诉你，我们不能批准它。
The sweet potato in the village is what I can not forget.
山村的地瓜是我不能忘怀的。
We can not ignore its enormous vitality for its simplicity.
我们不能因为它的简单性而忽略了它巨大的生命力。
They work several hours every day, so they can not go to regular school.
他们每天工作几个小时，所以他们不能去正规的学校。
Hello my one and only love, I miss you every day and can not even sleep.
您好，我唯一的爱，我每天都想念您，甚至不能睡觉。
Cans can hold what they can, but can not hold things that can't be canned.
能装进罐头的东西就可以装进罐头，不应该被装进罐头的东西就不能装进罐头。
The things that money can buy can not bring happiness to a person for long.
金钱能买到的东西不能长久地给人带来快乐。
它不可能是我的。
I am afraid we can not afford to take a taxi.
恐怕我们坐不起出租车。
Reading can not only enrich our knowledge, but also bring us pleasure.
读书不仅能丰富我们的知识，还能给我们带来快乐。
She can not only sing beautifully but also write her own songs.
她不仅唱歌好听，而且会自己写歌。
These used plastic masks can not only pollute the earth but also oceans.
这些用过的塑料口罩不仅会污染地球，还会污染海洋。
We can not see which way to go if the stars do not twinkle so.
如果星星不这样闪烁，我们就看不见该走哪条路。
My feet can not touch the ground.
我的脚够不到地。
不，这不可能是个不明飞行物。
The television can not turn on at certain times.
电视有时无法打开。
He can not only play basketball but also play chess.
他不仅会打篮球，还会下象棋。
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