"一把雨伞" 英文是 "an umbrella".
"Umbrella" 来源于拉丁语"umbra"，意为"阴影"或 "保护"。这个词最早被记录在16世纪英语中。
例句:
I always carry an umbrella with me in case it rains. (我总是带着一把雨伞，以防下雨。)
She opened the umbrella to protect herself from the sun. (她打开了雨伞来保护自己免受阳光的伤害。)
The umbrella is a useful tool for staying dry in the rain. (雨伞是在雨中保持干燥的有用工具。)