例： When I had my first baby friends warned me that children were expensive.
当我有了第一个孩子时，朋友们提醒我说养小孩是很花钱的。
例： They warned him of the dangers of sailing alone.
他们警告他独自航行的重重危险。
例： He warned of a possibility of a new terrorist attack.
他警告说可能会有一次新的恐怖袭击。
例： Analysts warned that Europe's most powerful economy may be facing trouble.
分析家警告说，欧洲最强大的经济体可能正面临困境。
例： He also warned of a possible anti-Western backlash.
他还对激烈反对西方的可能性发出警告。