one

Please buy one loaf of bread and one carton of milk from the store.

(Chinese) 请从商店买一条面包和一盒牛奶。

The Apollo 11 mission successfully landed one lunar module, Eagle, on the Moon in 1969.

(Chinese) 阿波罗11号任务于1969年成功将一个月球模块“鹰”降落在月球上。

One should always check the weather forecast before planning a long hike.

(Chinese) 一个人在计划长途徒步前应该总是查看天气预报。

In Victorian England, one was expected to follow strict social etiquette at all times.

(Chinese) 在维多利亚时代的英格兰，人们被期望时刻遵循严格的社会礼仪。