The flood of cars has now slowed to a trickle.汹涌的车流现在已经变得稀稀拉拉。A trickle of refugees began to flee the country.难民开始三五成群地陆续逃离该国。Trickle water gently over the back of your baby's head.往婴儿的脑后部轻撩些水。...
A new high activity , lowcost catalyst and the optimal reaction conditions were found by experiments.通过实验找到了一种新型、高效 、 廉价的催化剂,以及最佳反应条件.The project involves harvesting rainwater using special lowcost containers and digging...