bulbPLANT bQlb n [C] a round root of some plants from which the plant grows 球茎 Tulips, onions and lilies all grow from bulbs. 郁金香, 洋葱和百合都是由球茎长成的。 Plant the bulbs in soil 15 centimetres apart and three to five centimetres deep. 以15厘米的间距, 3至5厘米的深度种植球茎。