bunching什么意思？

They were bunching up, almost treading upon each other's heels.他们几乎脚尖踩着脚跟地挤作一团。The wave nature of the particle produces a bunching effect.粒子的波动性质产生了成群的效应.The wood - cutter is busy bunching.樵夫在忙于捆柴....

bunching的音标：bunching的英式发音音标为：['bʌntʃɪŋ]bunching的美式发音音标为：['bʌntʃɪŋ]...