Loading...
to replace the old with new; to renew; to renovate; to upgrade; to update; to regenerate
to change or replace; to experience; one of the five two-hour periods into which the night was formerly divided; watch (e.g. of a sentry or guard)
abbr. for Xinjiang 疆 or Singapore 坡; surname Xin
电脑软件需要及时更新升级。
Practice each character