1.mathematical constant 数学常量

例句：Write a program that displays the value of the mathematical constant

编写一个程序用来显示数学常量的值

2.date format 日期格式

例句：When this is not specified, the database server uses the date format specified in the DBDATE environment variable.

如果不指定这个值，则数据库服务器使用在 DBDATE 环境变量中指定的日期格式bS;=bd(yME5SaW。

3.hold record 保持记录

例句：South Africa's Amateurs hold the record for wins, with three tournament triumphs to their name.

南非业余队3夺冠军，保持此项赛事的夺冠纪录g_&t4hvqaypko4uxEs。

4.suffer from 遭受

例句：How long have you been suffering from a headache?

你头痛有多久了?