1、promise

承諾；保證；答應(yīng)

The post office has promised to resume first class mail delivery to the area on Friday.

郵局承諾于星期五恢復(fù)對這個地區(qū)第一類郵件的遞送。

He had promised that the rich and privileged would no longer get preferential treatment.

他已經(jīng)保證富人和特權(quán)階層不會再得到優(yōu)惠待遇。

答應(yīng)給予；承諾給予；保證讓…得到

In 1920 the great powers promised them an independent state.

1920年，列強(qiáng)承諾讓他們成為一個獨(dú)立的國家。

The officers promise a return to multiparty rule.

這些官員承諾恢復(fù)多黨統(tǒng)治。

諾言；承諾；保證

If you make a promise, you should keep it.

如果做出了承諾，就應(yīng)該遵守。

The program has lived up to its promise to promote family welfare.

這個項(xiàng)目恪守了其改善家庭福利的承諾。

2、persistent

（尤指不好或不受歡迎的狀態(tài)或情況）持續(xù)存在的，繼續(xù)發(fā)生的

Her position as national leader has been weakened by persistent fears of another coup attempt.

由于人們一直擔(dān)心會再次發(fā)生政變,她的國家領(lǐng)導(dǎo)人地位被削弱了。

His cough grew more persistent until it never stopped.

他咳嗽持續(xù)的時間越來越長,直到咳個不停。

執(zhí)著的；不屈不撓的；鍥而不舍的

a persistent critic of the government's transport policies.

對政府交通政策一直持批評態(tài)度的人

He phoned again this morning. He's very persistent.

今天早晨他又打來了電話。他非常執(zhí)著。