1.昨天晚上我去了市场/昨晚我去了市场。昨晚 is short for 昨天晚上。

2.我问他们，“你们有没有肉丝？”   since you mentioned "他们“， so better say"你们”。 

3.我的意思是“你们有肉松卖吗？“。

4.现在我知道这个叫肉松了。add 了。

5.他们明白我的意思了。=他们明白我说的了。

今天晚上我买了肉松

昨天晚上我去了市场。我问他们 “你有没有肉丝？“。我的意思是你们这里有肉松卖吗？他们不明白我的意思。我会用英文说"Shredded Pork"，但是他们听不懂英文。现在我知道这个叫”肉松“。今天晚上我问”你有没有肉松？”。他们明白了什么我说的是什么！！我买了它~~！！

Last night I went to the market. I asked them, "你有没有肉丝?". What I meant was "Do you sell shredded pork here?". I can say it in English, "Shredded Pork", but they do not understand it in English. Now, I know it is called "肉松". Tonight I asked them "你有没有肉松？". They understood what I was saying!! I bought it !!! :):):)

今天晚上我买了肉松

昨天晚上我去了市场。我问他们 “你有没有肉丝？“。我的意思是:"你们这里有肉松卖吗？"/我的意思是你们这里有没有肉松卖。他们不明白我的意思。我会用英文说"Shredded Pork"，但是他们听不懂英文。现在我知道这个叫”肉松“。今天晚上我问”你有没有肉松？”。他们明白什么我说的！！我买了它~~！！

Last night I went to the market. I asked them, "你有没有肉丝?". What I meant was "Do you sell shredded pork here?". I can say it in English, "Shredded Pork", but they do not understand it in English. Now, I know it is called "肉松". Tonight I asked them "你有没有肉松？". They understood what I was saying!! I bought it !!! :):):)

今天晚上我买了肉松

昨天晚上我去了市场。我问他们 “你有没有肉丝？“。我的意思是你们这里有肉松卖吗？他们不明白我的意思。我会用英文说"Shredded Pork"，但是他们听不懂英文。现在我知道这个叫”肉松“。今天晚上我问”这有没有肉松？”。他们终于明白我说的是什么！！我买了它~~！！

Last night I went to the market. I asked them, "你有没有肉丝?". What I meant was "Do you sell shredded pork here?". I can say it in English, "Shredded Pork", but they do not understand it in English. Now, I know it is called "肉松". Tonight I asked them "你有没有肉松？". They understood what I was saying!! I bought it !!! :):):)