1) You must free the Pegasus, Kratos.
你必须解放天马。
2) You must go right away!
你必须马上出去!
3) to be kept upright
必须竖放
4) You will have to pay up.
你必须付款。
5) You must do with what you've got.
你必须知足。
补充资料:冲击波超压与动压