hole down meaning in Chinese

净负洞数（分洞比赛时所输的球洞数）
净负分数
净负穴数

Temperature logs in bore holes down to several thousand metres are made by cable probes .
几千米钻孔用的温度测井装置是用电览探头做的。
It is necessory to keep your harmonica clear after playing . so keep a piece of clothes on your palm , and hit your harmonica against it with holes down
这样的话，吹过口琴要记得把口水拍吹来。在手掌上垫块布，然后孔朝下，使劲拍就好了。