Because they destroy so many insects, and insects include some of the greatest enemies of the human race.
因為它們能消滅那么多的昆蟲，其中包括一些人類的大敵，
新概念英語第四冊 Lesson 2 Spare that spider

?? 句中詞匯解析

從本句中提取的重要詞匯

because [b?'k?z] 詞頻1 詞根: be
conj. 因為;
?? cause, cuse 表原因,目的;司法程序,訴訟
"He was arrested because of his political affiliation."
他因所屬政黨的關系而被捕。
近義：since, whereas, for, forasmuchas
destroy [d?'str??] 詞頻1 詞根: struct
vt. 破壞，摧毀;消滅，殲滅（敵人）;殺死;使失敗;
?? de壞+stroy=struct建造 → 毀壞，破壞
"It is proverbially easier to destroy than to construct."
誰都知道破壞容易建設難.
近義：shatter, impair, kill, mar, obliterate, rack 反義：mend, refit, repair, service, tinker
include [?n'klud] 詞頻1 詞根: in
vt. 包括;包含;計入;包住;
?? in進入+clude關閉→關進去→包括
"Symptoms include diarrhoea and vomiting."
癥狀有腹瀉和嘔吐。
近義：append, attach, subjoin, adjoin, affix, enclose 反義：omit, preclude, blackball, except
human ['hjum?n] 詞頻1 詞根: hum
n. 人，人類; adj. 人的;有人性的;顯示人類特有弱點的;人本性的;
?? hum土,地+an名詞后綴，屬于...的，傳說人是由土造出的 → 人類
"The teacher drew an analogy between the human heart and a pump."
老師打了個比喻，把人的心臟比作水泵。
近義：mortal
race [res] 詞頻1
n. 賽跑;人種;競爭;民族; v. 參加比賽;快速移動;空轉;
?? 比賽跑（r=run）第一（ace，撲克a）
"Much to his chagrin, he did not win the race."
使他大為懊惱的是他賽跑沒獲勝.
近義：hurry, nip, run, scurry, speed, sprint 反義：pace

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