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