医生提醒他必须定时服药,否则治疗效果会大打折扣。Yīshēng tíxǐng tā bìxū dìngshí fúyào, fǒuzé zhìliáo xiàoguǒ huì dà dǎ zhékòu.The doctor reminded him that he must take his medicine at fixed times, otherwise the treatment would be much less effective.
这台洗衣机可以定时,晚上自己开始洗。Zhè tái xǐyījī kěyǐ dìngshí, wǎnshang zìjǐ kāishǐ xǐ.This washing machine can be put on a timer and starts washing by itself in the evening.
奶奶定时给花浇水,所以花开得特别好。Nǎinai dìngshí gěi huā jiāo shuǐ, suǒyǐ huā kāi de tèbié hǎo.Grandma waters the flowers at set times, so they bloom especially well.