George struggled wildly, going under and resurfacing at regular intervals.乔治疯狂地挣扎，不断在水面上浮浮沉沉。Make a point of backing up your files at regular intervals.一定要定期备份文件。The cartridge must be replaced at regular intervals.弹药必须定时...
Where are you going in that rig-out?你穿着那身打扮要去哪里？The severe conditions hampered attempts to pull the vessel free of the rig.恶劣的天气情况使得把那艘船拉离钻塔的努力很难奏效。They rig their domestic markets in favour of local businesses.他们操纵国内市场以使...