Definition: used to introduce a new idea that you want to say something about Level: C1
说到烘焙蛋糕，她可是个专家。
___When ___it ___comes ___to baking cakes, she's an expert.
他经验丰富，但说到电脑，他需要一些帮助。
He's very experienced, but ___when ___it ___comes ___to computers, he needs some help.
说到环境问题，很多人都有强烈的看法。
Many people have strong opinions ___when ___it ___comes ___to environmental issues.
