When something is gaseous, it is a gas, or it is like a gas: it has no fixed shape, and it can spread out to fill a space.

When something is gaseous當某樣東西是gaseous的時候，it is a gas, or it is like a gas表示它是氣體，或像氣體一樣：it has no fixed shape沒有固定形狀，and it can spread out to fill a space還能擴散、填滿一個空間。

Science class uses this word for one of the three common forms of stuff — solid, liquid, and gaseous. Steam is water in a gaseous form; the air around you is a mix of gaseous things you cannot see.

Science class uses this word科學課用這個字 for one of the three common forms of stuff來指三種常見物質狀態之一——solid, liquid, and gaseous固態、液態，和氣態（gaseous）。Steam水蒸氣 is water in a gaseous form是氣態的水；the air around you你周圍的空氣 is a mix of gaseous things you cannot see則是一堆看不見的氣態物質混在一起。

It is a careful school-and-lab word, not a kitchen word. People do not say “the air is gaseous” at dinner; they say it in lessons, in reports, or when they want to be exact.

It is這是 a careful school-and-lab word一個講究的教室和實驗室用字，not a kitchen word不是廚房裡會用的字。People do not say人們不會說 "the air is gaseous"「the air is gaseous」（空氣是氣態的） at dinner吃飯時；they say it這種說法出現 in lessons, in reports, or when they want to be exact在課堂、報告，或想講得精確的時候。

Though actually, a few writers stretch it to ideas that are not solid yet, but that use is rare and a little show-off. Do not mix it with gassy, which is the everyday word for drinks (or tummies) with too much gas in them.

Though actually不過其實，a few writers stretch it有些作者會把這個字延伸用 to ideas that are not solid yet在還沒成形的想法上，but that use is rare and a little show-off但這種用法很少見，也有點賣弄。Do not mix it with不要把它和 gassygassy搞混，which is the everyday word gassy是日常用字 for drinks (or tummies) with too much gas in them指飲料（或肚子）裡氣太多。