Did they tread unexpectedly upon an ant, crushing its hind part fast to the path, so the fore part could not free itself again?

他们是不是意外地踩到了一只蚂蚁， 将它的后半部分紧紧地压在了路上， 以至于前半部分无法再次脱身？

The fore part of his head was bald; but the hair grew thin and long behind, and every separate lock was a conduit for water.

他的前半部分秃了； 但是头发在后面变得又细又长， 每一缕分开的头发都是水的管道。

Stephen's vacant eyes rested upon the operations of some porters, who were shifting a dark and curious-looking van from the rear of the train, to shunt another which was between it and the fore part of the train.

斯蒂芬茫然的目光落在了一些搬运工的操作上，他们正在将一辆黑色的、看起来很奇怪的货车从火车尾部移开，以避开另一辆在它和火车前部之间的货车。