bulb是什麽意思

bulb

英 [bʌlb] 美 [bʌlb]

bulb：包。像個包一樣的東西——植物的球莖；燈泡。

bulb 球莖，燈泡

詞源同ball, 膨脹，鼓起，球。

bulb: bulb: [16] Bulb can be traced back to Greek bólbos, which was a name for various plants with a rounded swelling underground stem. In its passage via Latin bulbus to English it was often applied specifically to the ‘onion’, and that was its original meaning in English. Its application to the light bulb, dating from the 1850s, is an extension of an earlier 19th-century sense ‘bulbshaped swelling in a glass tube’, used from the 1830s for thermometer bulbs.
bulb (n.): 1560s, "an onion," from Middle French bulbe (15c.), from Latin bulbus "bulb, bulbous root, onion," from Greek bolbos "plant with round swelling on underground stem." Expanded by 1800 to "swelling in a glass tube" (thermometer bulb, light bulb, etc.).

1. A 40 watt bulb would be quite sufficient and would not obtrude.: 40瓦的燈泡完全夠亮了，並且不會晃眼。

2. An efficient bulb may lighten the load of power stations.: 一個節能燈泡也許就能減輕發電站的負荷。