Citral is a kind of natural spice used widely in food and daily chemical goods.柠檬酸是一种广泛应用于食品和日用化学品工业的天然香料.Process for the isolation of citral from natural Litsea cubeba oil and lemon oil were investigated.另外从柠檬草油的轻度馏份中,分...
Residents have been told to stay away from the region where the ship was grounded...居民们被告知不要靠近船只搁浅的区域。This paper presented a dart - cutting algorism, which grounded on the energy - based three - dimensional surface flatt...