salad可以是可数名词,也可以是不可数名词。
1、其意为“色拉”,若视为物质,不可数。如:Heeatsnothingbutsalad.他仅以色拉为食
2、若指“一份色拉”或“一盘色拉”,则可数。如:I’llmixasalad.我去拌一盘生菜。

(图片来自网络侵删)
Is cold meat and salad OK for lunch?
午饭吃冷肉和色拉行吗?
Dribble a little olive oil over the salad.
在色拉上面滴点橄榄油。
Serve with a green salad.
端上去的时候配一份生菜色拉。
The meat is served with salad or assorted vegetables.
端上的肉配有色拉或什锦蔬菜。