查询词典 twice differentiable function

once or twice a week：每周一两次

16.keep in good health 保持健康 | 17.once or twice a week 每周一两次 | 18.eating habits 饮食习惯

once or twice a week：一周一次或两次

four times a year 一年四次 | once or twice a week 一周一次或两次 | three or four times a week 一周三次或四次

once or twice a week：每周一或两次

6. activity survey 活动调查 | 7.once or twice a week 每周一或两次 | 8. the result of ...结果

once or twice a week：每周一到两次

three or four titmes a week每周三到四次 | once or twice a week每周一到两次 | 三.Sentence patterns

All right, once or twice：好吧 只有一两次

I really could have because men have come on to me plenty.|我真的可... | All right, once or twice.|好吧 只有一两次 | thirteen years of sex with the same man can be a little bit boring, all right?|和同一...

once or twice, but yes：但只要我想要,我就可以达到

I'll admit I have had to polish myself off...|偶有一两次我得假装一下 | once or twice, but yes.|但只要我想要,我就可以达到 | When I R.S.V.P. To a party, I make it my business to come.|我的可是不定时缺...

Maybe pneumonia once or twice：也许得过一两次肺炎

In prehistory, I can't tell you.|史前时代的,我无法告诉你 | Maybe pneumonia once or twice.|也许得过一两次肺炎 | Last few hundred years,|最近几百年

accidentally or otherwise：不管是不是意外

a loaded gun 上了膛的枪 | accidentally or otherwise 不管是不是意外 | I wouldn't have thought twice. 我不会犹豫再三

They say：人家说......, 据说

For him to master English, it would be necessary to study twice as hard as his classmates. 他想要... | 19. They say ... 人家说......, 据说...... | They say there's a sale on clothes on Beijing Road. 据...

Criminal record says I broke in twice：犯罪记录上说我曾两次违反校规

most of the time had better things to do 当然大部分时间我们有更好玩的事... | criminal record says i broke in twice 犯罪记录上说我曾两次违反校规 | i must've done it half a dozen times 事实上我起码干过六...

dioptric：折射光学的

dioptre 屈光度 | dioptric 折射光学的 | dioptrics 折射光学

Saturdays are fun：星期六很有趣

6. Saturdays are fun.星期六很有趣. | fun 为不可数名词,"快乐,有趣",在此做表语. | That must be fun. 那一定很有趣.