Butter, margarine, and oily fish are all good sources of vitamin D.黄油、人造黄油和多脂鱼都含有丰富的维生素D。You can buy a formulation containing royal jelly, pollen and vitamin C.可以买一种含蜂王浆、花粉和维生素C的配方产品。Liver and kidney are particularly ric...
工作人员不得投标承接私营部门的工作。The staff are forbidden to tender for private-sector work.他已经投标来拯救这个岌岌可危的周刊。He has submitted a bid to resuscitate the struggling magazine.他们打算投标承建一条新的高速公路.They are going to tender for the construction o...