whew
(also phew), interj (used as the written form of any of various sounds made by breathing out strongly or whistling to express amazement, relief, exhaustion or dismay 用作有聲響的呼氣聲或口哨聲之書面語象聲詞, 表示驚訝、 寬慰、 疲勞或沮喪均可)
Whew! That car was going fast! 嘿! 那輛汽車可真快!
Whew! That was a lucky escape! 哇! 這可是僥幸脫險哪!