Mary is eighty years old.
玛丽八十岁了。
This room has eighty guests.
这间房子里有80位客人。
She scored eighty points in the math test.
她在数学考试中得了80分。
There are eighty students in our class.
我们班有80名学生。
The book costs eighty dollars.
这本书的价格是80美元。
He worked eighty hours a week during the summer job.
他在暑期工作时每周工作80小时。
She's eighty years old, but still active.
她八十岁了，但仍然很活跃。
The marathon distance is eighty kilometers.
马拉松的距离是80公里。
They finished the project in eighty days.
他们用了80天完成了项目。
The temperature dropped to eighty below zero.
气温下降到了零下80度。
There are eighty countries participating in the Olympics.
有80个国家参加奥运会。
Eighty percent of the students passed the exam. (80%的学生通过了考试。
请注意，"eighty"在不同的语境中可能与具体的单位（如分数、温度、货币等）相关联，上述例句都考虑了通用的用法。
Eighty percent of these are exported, while the rest are sold in the domestic market," said Zhang, the chrysanthemum grower.
其中80%出口，其余在国内市场销售，”菊花种植者张说。
Eighty firms had an investment intensity of more than 3 percent, and six firms had over 10 percent.
80家公司的投资强度超过3%，6家公司的超过10%。
Eighty percent of its user base in China is younger than 35, and it estimates that in 2019, 62 percent of all outbound Chinese tourists will be aged 15 to 34.
Eighty measures, covering seven areas, were outlined in the plan.
该计划中概述了涵盖七个领域的八十项措施。
"Eighty percent of the energy in the park comes directly from wind power, photovoltaics, and energy storage.
Eighty percent of the replica oil paintings were exported.
The eighty theme parks received a total of 75.74 million visits last year in the Chinese mainland with the revenue totaling 15.36 billion yuan ($2.13 billion), an increase of 15.29 percent from a year earlier, the news portal ThePaper reported on Sunday.
Eighty transnational pharmaceutical companies like Pfizer, Novartis, Johnson & Johnson, Bayer, and Astellas Pharma are taking part in the exhibition.
八十家像辉瑞、诺华、强生、拜耳和安斯泰来制药这样的跨国制药公司正在参加这次展览。
Eighty percent of Macan owners never owned Porsches before.
Eighty percent of brands use it to enter the China market," she said.