四核性能的英文：
quad-core performance

quad bistable latch
四组双稳锁存器

The front quad, where I lived, was floored and tented.
在我居住的四方院子的前排楼房下已经铺起地板，支起帐篷。

Downhill running has its upsides but kills your quads. Here's how to avoid the burn.
下坡跑有好处，但是容易伤着您的股四头肌。以下是如何避免这种伤害。

inner core tube
内倒望远镜

magnetic core switch
磁铁心开关

core ,for electric transformers
线圈心,变压器用

She gave a respectable performance.
她的演出还不错。

The performances have been absolutely phenomenal.
表演绝对精彩。

It's an insufferably cute performance.
这是一场不能忍受的矫揉造作的表演。