切洋葱时,由于洋葱有一种挥发物质,常使切菜的人流泪。防止流泪的方法是:★在切洋葱前,把菜刀在冷水中浸一会儿,再切时就不会因受挥发物质刺激而流泪了。★将洋葱对半切开后,先泡一下凉水再切,就不会流泪了。★放微波炉稍微温一下,皮好剥,切起来也不流泪。★将洋葱浸入热水中3 When cutting onions, because of the onion has a volatile material, often make people who shed vegetables tears. Prevent tears are: ★ cut in front of the onion, the kitchen knife soaked in cold water for a while, then cut when the volatile substances will not be caused by the stimulation of tears. ★ cut the onion in half, the first bubble of cold water and then cut, it will not cry. ★ put the microwave a little warm, skin peel, cut it does not cry. ★ Dip the onion in hot water 3