Balsamic vinegar is aged until it becomes dark and mellow, with a sweet-sour flavor.

陈酿的香醋至颜色黑暗，味道醇厚酸甜。

youdao

The apple tasted just as I remembered – sharp, sour, yet sweet.

这苹果尝起来跟我记忆中的完全一样–味道十足，酸中带甜。

《柯林斯英汉双解大词典》

Generally, Thai food is hot, sweet and sour.

一般来说，泰国菜口味带辣、甜且酸。

youdao

WATER-COOKED FISH is a Sichuan preparation of poached white fish and wilted cabbage in a sweet-sour broth slicked with chili oil.

WSJ: Danny Bowien's Catfish a la Sichuan | Slow Food Fast

For hydration, there is water flavored with pandanus leaf, which tastes pleasantly of toasted rice, and fruit-flavored drinking vinegars, which, mixed with seltzer, are like sweet-and-sour sodas.

NEWYORKER: Pok Pok Ny

The sauce is based on a light sweet-and-sour, pepped up with a deep chile spiciness and a trace of Sichuan pepper that will make your lips tingle pleasantly.

NPR: Savoring The Spice In Kung Pao Chicken