abbr.list 清单,liquid-oxygen start tank 液氧起动箱,living structures tank 活动结构箱,large space telescope 大型空间望远镜
October lst, 1949 is a memorable day.
1949年10月1日是难忘的日子.
On October lst we celebrate our National Day.
十月一日我们庆祝国庆.
The meeting opened on April lst.
会议四月一日开幕了.