Formaldehyde is a strong-smelling gas. Mixed with water, it has long been used to keep dead animals and body parts from rotting, so that science students can look at them. That watery mix is often called formalin, and the smell is sharp and stays in your nose.

Formaldehyde Formaldehyde（甲醛） is a strong-smelling gas是一種氣味很強烈的氣體。 Mixed with water加水稀釋後, it has long been used很久以來被用來 to keep dead animals and body parts from rotting防止死掉的動物和身體部位腐爛, so that science students can look at them好讓科學課的學生可以觀察它們。 That watery mix那種水溶液 is often called formalin常被稱為formalin（福馬林）, and the smell is sharp and stays in your nose而那股氣味很嗆，會留在鼻子裡。

Factories also use it in some glues and wood finishes. Though actually, people worry about it because the gas can make your eyes and throat sting, and with a lot of contact over a long time it is treated as something that can harm health — so labs try not to let it float around freely.

Factories also use it工廠也會把它用 in some glues and wood finishes在一些膠水和木器塗料裡。 Though actually不過其實, people worry about it人們會擔心它 because the gas can make your eyes and throat sting因為這種氣體會讓眼睛和喉嚨刺痛, and with a lot of contact over a long time而長期大量接觸的話, it is treated as something that can harm health會被視為可能危害健康的東西 — so labs try not to let it float around freely所以實驗室會盡量不讓它到處飄散。

It is a chemistry and workshop word, not a kitchen word. You will meet it in science class, in talk about indoor air, and sometimes on product labels.

It is a chemistry and workshop word它是化學和工作坊的用詞, not a kitchen word不是廚房裡的詞。 You will meet it你會 in science class在科學課、 in talk about indoor air討論室內空氣品質時, and sometimes on product labels碰到它，有時候也會在產品標示上看到。