在英語四級詞匯復習的過程中，掌握四級高頻詞匯能起到事半功倍的效果。本文為大家歸納總結了部分高頻詞匯，希望大家多多練習。
operate on sb. 給某人做手術 operation n. come go into operation開始運轉 putbring sth. into operation 使…投產(chǎn),運轉
(be) intent on 專心致志, 堅決
in the interests of 符合…的利益 be interested in 對…感興趣
interfere in干涉, interfere with打攪,干擾
at intervals 每隔一會兒, 每隔一段距離
intervene in 干預
invest in 投資
be involved in (=become connected or concerned) 卷入, 參加
be opposite to 與…相反的
(be) in order(=acceptable)合適的,恰當?shù)?in order 井井有條,處于良好狀態(tài); out of order(=in bad condition)出毛病,發(fā)生故障
instead of (=in place of) 代替，而不是…
instruct…in (=teach) 教.指導.訓練某人…
lend itselfthemselves to適合于(某用途)
at length (=after a long time, at last)終于 at length (=in detail, thoroughly)詳細地
be liable for 對…應負責任的
insure…for 把…保險(多少錢); ensure 使安全; assure…(of) 使…確信,保證
by itself (=alone, without help)單獨地,靠自己