三条巧克力用英语可以说成 "three bars of chocolate"。
来源：由于巧克力通常是用长条状的形式生产和销售的，因此称为 "bar"。
英文例句:
I want to buy three bars of chocolate for my friend's birthday.
(我想买三条巧克力给我朋友的生日礼物。)
Can you please grab me three bars of chocolate from the store?
(你能帮我从商店里拿三条巧克力吗？)
I can't resist buying three bars of chocolate every time I see them.
(每次我看到巧克力就忍不住要买三条。)