王伟学习了两个小时的中文。
Wáng Wěi xuéxíle liǎng gè xiǎoshí de zhōngwén.
Wang Wei studied Chinese for two hours.
easy
晓明在公园里跑了一个小时。
Xiǎomíng zài gōngyuán lǐ pǎole yī gè xiǎoshí.
Xiaoming ran in the park for one hour.
easy
小明和马丽一起看了三个小时的电影。
Xiǎomíng hé Mǎ Lì yīqǐ kànle sān gè xiǎoshí de diànyǐng.
Xiaoming and Ma Li watched a movie together for three hours.
easy
建华告诉晓东，他昨天花了四个小时做作业。
Jiànhuá gàosù Xiǎodōng, tā zuótiān huāle sì gè xiǎoshí zuò zuòyè.
Jianhua told Xiaodong that he spent four hours doing homework yesterday.
medium
尽管马丽已经学习了五个小时的数学，但她仍然觉得有些问题很难理解。
Jǐnguǎn Mǎ Lì yǐjīng xuéxíle wǔ gè xiǎoshí de shùxué, dàn tā réngrán juédé yǒuxiē wèntí hěn nán lǐjiě.
Although Ma Li has already studied math for five hours, she still finds some problems difficult to understand.
hard