(a.) The principal rafters of a roof, especially a pair of
rafters taken together.
编辑:朗达
双语例句
Those firms which had not previously used direct-by-mail advertising were now coming to realize the many advantages of that modern selling short-cut and were compiling large lists of names. 佚名.神奇的知识之书.
Firms having mailing lists were increasing them. 佚名.神奇的知识之书.
Many firms, large and small, throughout the country were using and recommending the chain addressograph. 佚名.神奇的知识之书.
When the war over the twine-binder ended there were only twenty-two competing firms left; before that there had been over a hundred. 鲁伯特·萨金特·荷兰.历史性发明.
Through a cousin who works with Gelder, he found out the retail firms who had bought the busts. 阿瑟·柯南·道尔.福尔摩斯归来记.
It had one main entrance from the street to a hallway, from which entrance to the offices of two prominent broker firms was obtained. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
Priority was claimed by two firms of spectacle-makers in Middelburg, Holland, namely, Zacharias, miscal led Jansen, and Lippershey. 李贝.西洋科学史.
But, with the advent of large lists, the high cost of rubber type presented a serious objection to many firms regarding the installation of the addressograph. 佚名.神奇的知识之书.