The old bridge threatened to colla e beneath the weight of our truck.

这座老旧的桥梁恐怕快被我们卡车的重量给压垮了.

The financial catastrophe initiated by the colla eof the stack market hit the country a deadly blow.

由股市崩溃引发的金融灾难，使这个国家遭受了致命的打击。

By ultrasound, the speed of bleaching of hydrogen peroxide could be accelerated and the structure of colla …

超声波在一定程度上能加快过氧化氢的漂白速度，不会对皮胶原纤维结构产生不良影响。

By ultrasound, the speed of bleaching of hydrogen peroxide could be accelerated and the structure of colla. . .

超声波在一定程度上能加快过氧化氢的漂白速度，不会对皮胶原纤维结构产生不良影响。