481 once and for all =once and forever永遠(yuǎn)地 all at once 立即,馬上 once in a while 立即,馬上 once in a while 偶爾 for once 就這一次

　　482. by oneself 獨自

　　483. operate on sb. 給某人做手術(shù) operation n. come go into operation開始運轉(zhuǎn) putbring sth. into operation 使投產(chǎn),運轉(zhuǎn)

　　484. be of the opinion 持有的看法

　　485. in ones opinion 按某人的看法

　　486. be opposed to 反對

　　487. be opposite to 與相反的

　　488. in order合適的,恰當(dāng)?shù)?in order 井井有條,處于良好狀態(tài); out of order出毛病,發(fā)生故障

　　489. made to order 定做的

　　490. originate infrom起源于,由..引起

　　491. on the outskirts 在城郊

　　492. oweto 把歸于

　　493. on ones own 單獨

　　494. of ones own某人自己的

　　495. keep pace with 跟齊步前進(jìn)

　　496. go to great pains=take pains 下功夫,努力

　　497. part with 舍棄,賣掉

　　498. participate in 參加

　　499. particular about 講究,挑剔

　　500. in particular 特別是,尤其

　　501. passion for 對的熱愛,熱情

　　502. be patient with 對耐心

　　503. pay for 賠償, 付款, 報償, 處罰

　　504. payfor 付的錢

　　505. at peace with 與和睦相處 in peace 安靜,平安

　　506. peculiar to 特有的, 獨具的

　　507. penalty for 對的處罰,罰金

　　508. perform on the piano 演奏鋼琴

　　509. persist in 堅持,固執(zhí)

　　510. in person 親自, 當(dāng)面

　　481 once and for all =once and forever永遠(yuǎn)地 all at once 立即,馬上 once in a while 立即,馬上 once in a while 偶爾 for once 就這一次

　　482. by oneself 獨自

　　483. operate on sb. 給某人做手術(shù) operation n. come go into operation開始運轉(zhuǎn) putbring sth. into operation 使投產(chǎn),運轉(zhuǎn)

　　484. be of the opinion 持有的看法

　　485. in ones opinion 按某人的看法

　　486. be opposed to 反對

　　487. be opposite to 與相反的

　　488. in order合適的,恰當(dāng)?shù)?in order 井井有條,處于良好狀態(tài); out of order出毛病,發(fā)生故障

　　489. made to order 定做的

　　490. originate infrom起源于,由..引起

　　491. on the outskirts 在城郊

　　492. oweto 把歸于

　　493. on ones own 單獨

　　494. of ones own某人自己的

　　495. keep pace with 跟齊步前進(jìn)

　　496. go to great pains=take pains 下功夫,努力

　　497. part with 舍棄,賣掉

　　498. participate in 參加

　　499. particular about 講究,挑剔

　　500. in particular 特別是,尤其

　　501. passion for 對的熱愛,熱情

　　502. be patient with 對耐心

　　503. pay for 賠償, 付款, 報償, 處罰

　　504. payfor 付的錢

　　505. at peace with 與和睦相處 in peace 安靜,平安

　　506. peculiar to 特有的, 獨具的

　　507. penalty for 對的處罰,罰金

　　508. perform on the piano 演奏鋼琴

　　509. persist in 堅持,固執(zhí)

　　510. in person 親自, 當(dāng)面