Light colours provide an effective backdrop for pictures or a mirror.浅色是挂放图画或镜子很有效果的衬托。The mountains provided a dramatic backdrop for our picnic.群山如画，给我们的野餐平添景色。The large bay has a superb backdrop of mountains.大海湾背靠着庄严的山...
He agreed on condition that I bombard the enemy house.他同意了,条件是我去轰炸敌人的房子.The molecules of air would bombard all sides and both ends of the cylinder.空气的分子会撞击圆筒的整个筒壁和上下两端.Every moment countless bits of sensory information b...