What clothes should I take to travel to four European countries in April?

In mid-April, the weather is fine. Bloom is warm in spring, and the temperature in Europe is the same as ours. When you play ball, you can wear a T-shirt inside, a coat outside, brand sportswear and Nike. Below are jeans, or casual pants and sneakers, full of youthful vitality and leisure freedom. Wear as little clothes as possible, and wear a sweater with thin sleeves. Wear casual clothes, don't dress too formally, eat more snacks. You can take it out at any time on the bus, because European food is so bad that you can only eat it well when you are full. You can take a small bag of mustard tuber and the like with you when you eat it, and sometimes you can eat it if you don't like it. . . .