All the schools have music and dancing as part of the curriculum.所有学校都设有音乐和舞蹈课。The staff should work together to revise the school curriculum.全体教职工应当齐心协力修订学校课程。Russian is the one compulsory foreign language on the school...
上述提到的产品都属于石油蒸馏物.All of the above - mentioned products fall under the category of Petroleum Distillates.这使得蒸馏物中 A:B 比率发生缓慢的变化.This results in a slowly changing ratio A : B in the distillate....