挖下 meaning in Chinese

dig down

Edmond rose again , but this time his legs did not tremble , and his sight was clear ; he went to a corner of his dungeon , detached a stone , and with it knocked against the wall where the sound came
爱德蒙又一次起身，这次他的腿不抖了，也不再眼花目眩了。他走到地牢的一角，挖下一块因受潮而松动的石片，拿来敲击那墙壁上声音听得最清楚的地方。
Whole days have i passed in these titanic efforts , considering my labor well repaid if , by night - time i had contrived to carry away a square inch of this hard - bound cement , changed by ages into a substance unyielding as the stones themselves ; then to conceal the mass of earth and rubbish i dug up , i was compelled to break through a staircase , and throw the fruits of my labor into the hollow part of it ; but the well is now so completely choked up , that i scarcely think it would be possible to add another handful of dust without leading to discovery
我整天都做着这种非人力所及的工作，如果到晚上我能挖下一寸见方这种坚实的水泥，就认为自己是很不错的了。你知道，这种水泥，由于年代已久，简直如同石头一般难挖。然后，我又得把挖出来的大量泥土灰沙藏起来，我不得不掘通一条楼梯，把它们扔到楼梯底下的空隙里。