Constant dropping wears away a stone, not strength, but kungfu deep.
滴水穿石，不是力量大，而是功夫深。
2
Dynamic consolidation is a way to improve soil strength and reduce compressibility of the soil by lifting and dropping a heavy hammer very high to hit the foundation soil.
强夯法，是将重锤起吊到高处自由落下，对地基进行强力夯实，提高土体强度、降低其压缩性。
3
Already they are dropping the alcohol strength to get below that duty level.