We'll leave some evenings free,that is,if it is all right with you.
如果你們愿意的話,我們想留幾個晚上供你們自由支配。
Those planning a trip to remote areas, or intending to live in countries where drinking water is not readily available, should know about the various possible methods for making water safe.
那些計劃去偏遠地區旅行,或在飲用水不現成的國家居住的人,應該知道如何使水適于飲用的各種辦法。