如果主服务器不可用，但客户机尚具有网络连接，就需要故障转换到备用服务器，而不是使用系统时间。

If the primary server is unavailable, but the client still has network connectivity, you want to fail over to a secondary server as opposed to using system time.

youdao

达味王又对全会众说：「我的儿子撒罗满，天主所特选的，尚年轻软弱，而这工程又浩大，因为这殿宇不是为人，而是为上主天主；

And king David said to all the assembly: Solomon my son, whom alone God hath chosen, is as yet young and tender: and the work is great, for a house is prepared not for man, but for God.

youdao

达味王又对全会众说：「我的儿子撒罗满，天主所特选的，尚年轻软弱，而这工程又浩大，因为这殿宇不是为人，而是为上主天主；

And king David said to all the assembly: Solomon my son, whom alone God hath chosen, is as yet young and tender: and the work is great, for a house is prepared not for man, but for God.

youdao