noun [sing] all the people in the world, thought of as a group 人类 [SYN] humanity 同义词为humanity
the imperative²
/ɪmˈperətɪv ||; ɪmˈpɛrətɪv/noun [C] (grammar语法) the form of the verb that is used for giving orders 祈使语气: In ‘Shut the door!’ the verb is in the imperative.在Shut the door!这个句子里，动词用了祈使语气。
the imperfect²
/ɪmˈpɜ:fɪkt ||; ɪmˈpɝfɪkt/noun [U] (grammar语法) used for expressing action in the past that is not completed 未完成时；未完成式: In ‘I was having a bath’, the verb is in the imperfect.在I was having a bath这个句子里，动词用了未完成时。It is more usual to call this tense the past continuous or past progressive. 未完成时一般叫做past continuous或past progressive（过去进行时）。