普通灯泡太费电，节能的那些能省不少钱。
Regular light bulbs use too much electricity. Energy-saving ones save a lot of money.
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energy-saving英 /ˈenədʒi-seɪvɪŋ/|美 /ˈɛnərdʒi-seɪvɪŋ/
ones英 /wʌnz/|美 /wʌnz/
解释
energy-saving 为复合形容词 premodifier，ones 替代 light bulbs。energy-saving ones 泛指节能灯泡。
Regular light bulbs use too much electricity. Energy-saving ones save a lot of money.
energy-saving 为复合形容词 premodifier，ones 替代 light bulbs。energy-saving ones 泛指节能灯泡。