英语四级单词记忆妙招：学单词同根词速记

　　2. strain,strict,string,stress=draw tight(拉紧)

　　restraint: re-(back)+strain(拉紧)+t→抑制

　　restrain: re-(back)+strain(拉紧)→抑制

　　constrict: con-(together)+strict(拉紧)→使缩紧

　　district: di-(apart)+strict(拉紧)→地区

　　restrict: re-(again)+strict(拉紧)→约束

　　distress: di-(apart)+stress(拉紧)→使痛苦

　　3. tain, ten, tin=hold(拿), keep(保持)

　　attain: at-(to)+tain(拿)→拿到→达到

　　contain: con-(together)+tain(保持)→包含

　　container: contain(容纳)+-er(表物)→容器

　　maintain: main(head)+tain(拿)→保持

　　obtain: ob-(near)+tain(拿)→获得

　　retain: re-(back)+tain(拿)→保持，保留

　　sustain: sus-(下面)+tain(保持)→在下面保持→支持，支撑

　　entertainment: entertain(使欢乐，招待)+-ment→娱乐

　　entertain: enter-(among)+tain(保持)→使欢乐

　　content: con-(together)+ten(拿)+t→拿在一起→内容，容量

　　maintenance: main(head)+ten(拿)+-ance→保持

　　continue: con-(together)+tin(拿)+ue→延伸

　　continual: continu(=continue)+-al(…的)→不停的