Teeth have a hard surface layer called enamel.
牙齿有一层叫做釉质的坚硬表层。
By then, Steve was having a hard time remembering the names of some of his friends.
那时，史蒂夫已经很难记住一些朋友的名字了。
I'm supposed to do a literature review for my psychology course, but I'm having a hard time finding articles.
我应该为我的心理学课程做文献回顾，但是很难找到文章。
A conclusion has been drawn from many experiments that anumeric people have a hard time distinguishing quantities.
从许多实验中得出的结论是，（语言中）没有数词的人很难区分数量。
He gave her a hard push which toppled her backwards into an armchair.
他给了她用力的一推，将她向后推倒在一把扶手椅上。
Propolis is a hard resinous substance made by bees from the juices of plants.
蜂胶是蜜蜂用植物汁液合成的像树脂一样的坚硬物质。
In a hard-hitting speech to the IMF, he urged Third World countries to undertake sweeping reforms.
在向国际货币基金组织所作的一次一针见血的演讲中，他敦促第三世界国家进行全面改革。
Her grandmother has had a hard life.
她的祖母过着艰难的生活。
What a hard-working boy Zhou Bin is!
周斌是一个多么勤奋的男孩啊！
Being a journalist is a hard but great job.
记者是一份艰难却伟大的工作。
It was a hard hit, but his influence stayed.
这是一个沉重的打击，但他对我的影响仍然存在。
"I am having a hard time," the young man said.
“我现在过得很艰难。”年轻人说。
He thought himself only a hard-boiled newspaperman.
他认为自己只是一个铁石心肠的新闻记者。
When he was young, he and his mother had a hard life.
当他年轻的时候，他和他的母亲过着艰难的生活。
They lived a hard life and fought against the enemies.
他们过着艰苦的生活，与敌人作战。
Though the girl lives a hard life, she never feels sad.
虽然这个女孩过着艰难的生活，但她从不感到悲伤。
It's a hard job, but he works hard to support the family.
工作很艰苦，但他依旧努力工作挣钱养家。
When I was young, my family led a hard life in the country.
在我小时候，我们家在乡下过着艰苦的生活。
In learning, a hard-working fool gets more than a lazy wise.
在学习上，一个勤奋的傻瓜比一个懒惰的聪明人得到更多。
Chester felt more tired than usual after a hard day at the office.
在办公室辛苦工作了一天之后，切斯特觉得比平时更累了。
It's been a hard year, but I'm getting better, though it takes time.
这是艰难的一年，但我正在好起来，尽管这需要时间。
The Little Match Girl makes me feel sad because she lives a hard life.
《卖火柴的小女孩》的故事让我感到难过，因为她过着艰难的生活。
The local people used to live a hard life because of the shortage of water.
因为缺水，当地人民过去过着艰难的生活。
Peter had a hard time with his goats that day, for they would not follow him.
那天彼得和他的山羊闹得很不愉快，因为它们不肯跟着他。
If nothing else, it will give you a good taste of what a hard life farming is.
它至少会让你更好地体会到种田的生活有多艰苦。
With a hard job in a factory, he doesn't find much time to visit his hometown.
由于在一家工厂工作很辛苦，他没有太多时间回老家。
Peter, whose round eyes could only move about slowly, had a hard time looking out for her.
彼得那双圆眼睛迟钝地转动着，好不容易才找到她。
When his friend remained silent, he continued: "Just think what a hard summer Clara has had!"
当他的朋友保持沉默时，他继续说：“想想克拉拉经历了一个多么艰难的夏天啊！”
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