Throughout the exercise, focus on keeping your abs tight.整个锻炼过程中，注意要紧绷腹肌。an anti-lock braking system or ABS防抱死装置ABS piping is normally used in High Purity DI Water System.ABS配管通常使用于高纯度的DI水系统....
Throughout the exercise, focus on keeping your abs tight.整个锻炼过程中，注意要紧绷腹肌。an anti-lock braking system or ABS防抱死装置ABS piping is normally used in High Purity DI Water System.ABS配管通常使用于高纯度的DI水系统....
His car was held up and he was abducted by four gunmen.他的车遭遇拦劫，随后他被4名持枪歹徒劫持。The gunmen calmly walked away and escaped in a waiting car.持枪歹徒不慌不忙地走开，坐上一辆等候的汽车逃走了。Bands of gunmen have hijacked food shipments and terrorized ...