单词have a screw loose
na.: 螺丝钉松了；(精神等)有点失常[不对头]
网络: 疯疯癫癫；头脑有问题；短路
He must have a screw loose somewhere; he"s acting really strangely.
他一定是哪根筋不对，他的行动真奇怪。
Bill must have a screw loose somewhere; he"s acting really strangely.
比尔肯定是哪里不对劲了，他的行为很奇怪啊。
Bill must have a screw loose somewhere; he"s acting really strangely. Bill
一定是哪根筋不对，他的行动真奇怪。