★affectionate adj. 充满情深的，柔情的
Cats are affectionate animals.
The lady is looking that man affectionately.
★mysterious adj. 神秘的，难以理解的
a mysterious plan
a mysterious explanation
mystery n. 迷团，神秘感
His death is a mystery.
★submissive adj. 服从的，顺从的
Are you obedient?
Dogs and horses are submissive, but Cats are never submissive to us.
be submissive to sb.
Submit oneself to sb. / sth. 屈服于，顺从于
★feline adj. 猫的
★independence n. 独立，独立性
You have already grown up, you must be independent.
You must depend on yourself.
★high-rise adj. 高层的
★paratrooper n. 伞兵
★squirrel n. 松鼠
★air-resistance n. 空气阻力
★impact n. 冲击力
nver fail to do 双重否定＝＝肯定
If you aks for help in the polite way, you never fail to succeed.
If you receive requests like this, you'll never fail to accept.
1． never fail to, can't fail to, don't fail to , 否定词+fail to（语气较强烈）
2． 否定的形容词之前加以否定 unreasonable-> not unreasonable
Eg: What he said is not unreasonable.
It is quite common (not uncommon ) for us to make mistakes.
3． not + without
Eg: You can't obtain english without working hard.
He doesn’t have any meal without meat.