Many types of clam escape predators by burrowing into the sea bed using alternating movements of their shell and of the soft, muscular foot contained within that shell.
许多蛤类利用双壳及内部柔软强健足部的交替运动在河床上掘洞来逃避天敌。
2
Although born to the ease of plantation life, waited on hand and foot since infancy, the faces of the three on the porch were neither slack nor soft.
虽然坐在走廊里的人，都同生在优裕的庄园主家庭，从小由仆人细心服侍着，但他们的脸显得并不懒散。
3
A soft moonlight night, I was in a foot high tree fell.