no-brainer
n. 不伤脑筋的事, 无需用脑的事
例句与用法：
It is no wonder (that) he'll sign the contract tomorrow.
他明天签约是不足为怪的。
No wonder people say that computers are taking over the world.
难怪有人说电子计算机正渐渐接管世界。
No wonder the firm makes a loss; the office is terribly overstaffed.
难怪公司亏损，办公室严重超编。
No wonder you are licking your chops, there's pork for dinner.
怪不得你们在舐着嘴唇，原来晚餐有肉。
No wonder you were late!
难怪你来晚了！
详细释义：
n.
无需用脑的事; 容易的事