Insecticidal is the describing word for something that kills insects. An insecticidal spray, powder, or soap is made to kill bugs — on plants, in a house, or on a farm. The chemical itself is usually called an insecticide; insecticidal tells you what kind of thing you are looking at.

Insecticidal is the describing wordinsecticidal是形容詞，for something that kills insects用來說某個東西會殺蟲。An insecticidal spray, powder, or soap殺蟲用的噴劑、粉，或肥皂 is made to kill bugs是做來殺蟲的——on plants, in a house, or on a farm用在植物上、家裡，或農場上。The chemical itself那個化學物質本身 is usually called an insecticide通常叫做 insecticide（殺蟲劑）；insecticidal tells you what kind of thing you are looking atinsecticidal則是告訴你你看到的是哪一種東西。

Though actually, labels and everyday talk sometimes treat the two as the same word, as if insecticidal were the name of the bottle. In careful English it is not.

Though actually不過實際上，labels and everyday talk標籤和日常講法 sometimes treat the two as the same word有時候會把這兩個字當成同一個字用，as if insecticidal were the name of the bottle好像 insecticidal 就是那瓶東西的名字。In careful English it is not但在講究的英文裡並不是這樣。

You meet it in gardening, farming, and science, not in ordinary chat. Stepping on an ant is not “insecticidal.” The word is about a substance (or a property) whose job is to kill insects.

You meet it你會看到這個字 in gardening, farming, and science出現在園藝、農業，和科學裡，not in ordinary chat不會出現在日常聊天裡。Stepping on an ant is not "insecticidal."踩死一隻螞蟻不算是「insecticidal」——The word is about a substance (or a property)這個字說的是一種物質（或特性），whose job is to kill insects它的作用是殺蟲。