Trev: I can make better ice cream than this.

　　Wei: You can make ice cream?

　　Trev: Yeah. It’s easy. All you need is ice, salt, cream, milk and sugar.

　　Wei: So you just put it all together and bam, you have ice cream, right?

　　Trev: Wrong. You have to put it into an ice cream maker. Old-style ones were operated with a hand crank.

　　Wei: That sounds tiring.

　　Trev: It’s kind of fun. Everybody has to do a little cranking if they want some ice cream.

　　崔佛：我可以做出比这个更好吃的冰淇淋。

　　小薇：你会做冰淇淋?

　　崔佛：是啊。很简单。只需要冰、盐、鲜奶油、牛奶和糖。

　　小薇：所以全部加在一起，然后砰一声，冰淇淋就好了，是吧?

　　崔佛：错。需要把材料放进冰淇淋制造机。早期的机器是靠一支把手操作。

　　小薇：听起来很累。

　　崔佛：还蛮好玩的。每个想吃冰淇淋的人都得来摇两下把手。

　　重点解说

　　and bam... (做某些事)然后碰一声，(某样东西)就变出来了。表示某样东西得来太容易

　　operate (v.) 操作

　　hand crank 可摇动旋转的把手，crank在这边是名词，crank当动词用时表示「摇把手」

　　tiring (a.) 让人疲倦的