English: When in hilly areas, you need to be cautious and alert by camping on sunnier side and have the right flank and rear guard on higher ground.是什么意思_English: When in hilly areas, you need to be cautious and alert by camping on sunnier side and have the right flank and rear guard on higher ground.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句