operation [,ɑpə'reʃən] 词频1 词根: oper

n. 操作，经营;手术;[数]运算;作用;

💡 oper 工作 + ation 表示行为、状态、过程 → n.操作；手术；运算

"a triple bypass operation"

近义：campaign, enterprise, errand, maneuver, maneuvering, manoeuvering

last [læst] 词频1 词根: /lə/

n. 末尾;最后;上个;鞋楦（做鞋的模型）; vt. 经受住;到…之后;够用;足够维持（尤指某段时间）; adj. 最近的;最后的;最不可能的;惟一剩下的; vi. 持续; adv. 上一次，最近一次;最后;

"The two sides signed a peace accord last July."

近义：live, persist, stand, subsist, survive, hindermost 反义：part, croak, decease, depart, die, expire

said [sed] 词频1

adj. [律]上述的;少说为妙;（做）某事有/没有很多优点（或好处）：某事物有/没有多少可说的;说到底; v. 说，讲( say的过去式和过去分词 );表明;念;说明;

"Afterwards she was sorry for what she'd said."

近义：indicated, spoken, stated, this, aforementioned, aforesaid

think [θɪŋk] 词频1

vt. 想;思索;以为;看待; vi. 思辩;考虑;构想;回忆; adj. 深思的;供思考的; n. 想;想法;

💡 深刻(谐音):深刻的思 想 我在想（think）该如何感谢（thank）他们

"They'll think you're being antisocial if you don't go."

近义：imagine, meditate, mull, perpend, ponder, ratiocinate

help [hɛlp] 词频1 词根: /hʌn/

vt.& vi. 帮助;有助于， 有利于; vt. 治疗;避免;招待（客人）;给…盛（饭、菜）; n. 帮助;助手;补救办法;有用; vi. （在餐桌旁）招待，侍应，作仆人（或店员、服务员等）; int. [呼救语]救命！;

💡 同义词：assist，aid

"He finally agreed, albeit reluctantly, to help us."

近义：assist, assuage, attend, succor, succour, support 反义：leave, neglect, quit, strand, desert, forsake