grain of soap

例句：

1. 1. She used a small grain of soap to clean her dishes.
   她用一小粒肥皂来清洗餐具。
2. 2. The soap factory produces high-quality soap grains for the market.
   这家肥皂厂生产高品质的肥皂粒供应市场。
3. 3. He carefully placed the grain of soap into the dishwasher.
   他小心翼翼地将肥皂粒放入洗碗机。