“This contract is made by and between the buyer and sellers，whereby the buyers agree to buy and the sellers agree to sell the under mentioned goods subject to the terms and conditions as stipulated herein- after”，正确翻译为( )。

A．本合同由买方、卖方共同制定，买方同意按卖方要求买下以下商品
B．本合同由双方共同制定，卖方同意按买方要求卖出以下商品
C．兹经买卖双方同意按照以下条款由买方购进卖方卖出以下商品
D．兹经双方同意，卖方同意按买方要求卖出以下商品

无论屋面的设防等级是高还是低，都应对细部构造、节点进行重点设防。重点设防的方法是：接缝部位柔性密封，转角、收头部位应增设附加防水层。( )