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艾米Amysweety
米粒 [词典] rice grains; [天] granule; [例句]小孩子们正试图铲起从麻袋中散落的米粒儿。Young children were trying to scrape up some of the rice that spilled from the sacks.
偶是杨洋
granule或者grain
ritafanfan
particle 和granule都有颗粒的意思，但particle更小，granule稍大所以这道题要用particle。8mm属于很小的颗粒。
Q糖奶爸
a grain of rice 一粒米
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