✔ 最佳答案
Both characters belong under the radical 草 (grass). The radical indicates the character has something to do with harvest, plantation, flower, etc. For example these characters: 芽 (bud), 花 (flower), 芬 (fragrance) and 苦 (bitter) are all characters that has something to do with plants.
Similarly, these characters 汗池汕沐 belong to the radical 水 (water). All these characters are water-related. And characters like 灰災炸 have the radical 火 (fire) and are fire-related.
One thing about the Chinese written language is that you need to learn which radical the character belongs to. For example, 沐 is made up of 水 and 木 (wood), which is another common radical but the character is under the water radical in the Chinese dictionary.
Also, by knowing the meaning of the word, you can always guess the proper radical to use. For example, he, she and it pronounced the same in Chinese but written differently (with different radicals). But by knowing the meaning of the word (or the context of the sentence) you can guess the proper one to use. 他 with the "人" (man) radical means he or person in general. 她 with the "女" (female) radical means she, 牠 with the "牛" (animal) radical means it (animals) and 它 means it (inanimated objects).
Some common radicals: 刀 (cut, knife, weapon), 口 (mouth, oral), 土 (earth, soil), 女 (female), 山 (mountain, terrain), 心 (heart), 人 (human, man), 月 (meat, organ), 日 (sun, light), 火 (fire), 水 (water), 羽 (feather), 言 (oral, speech), 金 (metal, element), 食 (food), 鳥 (birds).
