Definition
Describes something that can be done very easily.
易如反掌
For this experienced chef, making this dish is like standing on their head.
對於這位經驗豐富的廚師來說，做這道菜就像倒立一樣容易。
He could solve this problem in no time; it's like standing on his head for him.
他能夠很快解決這個問題；對他來說就像倒立一樣容易。
My sister is so good at math; solving these equations is like standing on her head for her.
我妹妹數學很好；解這些方程式對她來說就像倒立一樣容易。