Motocross is a kind of motorcycle racing, but not on a road and not on a smooth track. The riders race on rough ground outside — dirt, mud, sand, grass — going up and down hills, over big bumps that throw the bike into the air, and sometimes through shallow water.

Motocross is a kind of motorcycle racingmotocross是一種機車比賽 but not on a road and not on a smooth track但不是在馬路上，也不是在平坦的賽道上 The riders race on rough ground outside車手是在戶外崎嶇的地面上比賽 — dirt, mud, sand, grass ———泥地、爛泥、沙地、草地—— going up and down hills上上下下地爬坡下坡 over big bumps that throw the bike into the air越過會把車子彈到空中的大坑洞 and sometimes through shallow water有時候還要穿過淺水

The bikes are built for this: light, with knobbly tyres and long soft springs so they can land hard without breaking. The riders wear thick boots, body armour, and a helmet with a long front piece and goggles, because they are going to fall.

The bikes are built for this車子就是為了這種地形設計的 light, with knobbly tyres and long soft springs很輕、輪胎有很多凸粒、避震彈簧又長又軟 so they can land hard without breaking這樣重摔落地才不會壞掉 The riders wear thick boots, body armour, and a helmet with a long front piece and goggles車手會穿厚靴子、護甲，戴前面有長舌片的安全帽和護目鏡 because they are going to fall因為他們一定會摔車

Everyone falls. That is part of the sport.

Everyone falls每個人都會摔 That is part of the sport這就是這項運動的一部分

The word is both the name of the sport and a word you put in front of other words: a motocross bike, a motocross track, a motocross rider. In everyday talk in English-speaking countries, people often shorten it to 'MX' in writing, especially on race posters and bike names — a 'motocross bike' becomes an 'MX bike'.

The word is both the name of the sport這個字既是這項運動的名字 and a word you put in front of other words也可以放在別的字前面用 a motocross bike, a motocross track, a motocross rider像motocross bike（越野賽車）、motocross track（越野賽道）、motocross rider（越野車手） In everyday talk in English-speaking countries在英語系國家的日常說法裡 people often shorten it to 'MX' in writing書面上大家常常簡寫成『MX』 especially on race posters and bike names特別是比賽海報和車款名稱上 — a 'motocross bike' becomes an 'MX bike'.——『motocross bike』會變成『MX bike』

There is also a version raced indoors in a stadium with a man-made dirt course; that has its own name, supercross, though ordinary people mix the two words up all the time.

There is also a version raced indoors in a stadium with a man-made dirt course也有一種在體育場室內、用人工泥地賽道比賽的版本 that has its own name, supercross那有自己的名字，叫supercross though ordinary people mix the two words up all the time不過一般人常常把這兩個字搞混

One thing to notice: motocross is a race, with a start line and a finish. If someone is just riding a dirt bike in the hills for fun, that is not motocross, even on the same bike — English speakers would call that trail riding or just riding dirt bikes.

One thing to notice有一點要注意 motocross is a race, with a start line and a finishmotocross是一場比賽，有起點也有終點 If someone is just riding a dirt bike in the hills for fun如果有人只是騎越野機車在山上隨便玩玩 that is not motocross, even on the same bike就算用的是同一台車，那也不算motocross — English speakers would call that trail riding or just riding dirt bikes.——英語使用者會說那是trail riding，或就是riding dirt bikes（騎越野車）