1、裂点
... 崖脚穴；隔阂(生态) niche 裂点 nick point(knick-point) 镍华 nickel bloom ...
2、水浅石多
...[edge out] 以微弱的优势获胜[dangerous rapids (shoals);nick point] 水浅石多,水流湍急,行船危险的地方[dangerous phenomenon] 危险的现象 ...
3、迁急点
... 牛顿反射望远镜 Newtonian reflector 迁急点，裂点 nick point 夜间观测器 night observation device ...