知識貝殼
知識貝殼
所屬欄目：英語常見問題解答
a lamp【問】 The gas-filled tungsten filament lamp is more of a furnace than a lamp. Since it uses ninety per cent of the power to produce unwanted heat and uses only ten percent to makelight.[原譯]這種充氣鎢絲燈與其說是一盞燈,不如說是一個火爐。因為它耗去90%的電能去 ......（本文共 840 字 ） [閱讀本文] >>