silica gel

例句：

1. 1. Thissilica gel is used to absorb moisturein the air.
   这种硅胶凝胶用于吸收空气中的水分。
2. 2. The silica gelwas used to prevent the food from spoiling.
   这种硅胶凝胶被用来防止食物变质。
3. 3. The silica gel was placedon the table to keep it dry.
   将硅胶凝胶放在桌子上以保持其干燥。