"At Costco, salad is washed in a commercial-grade salad spinner. The salad is placed in the spinner and then rinsed with cold water. The spinner is then spun to remove any dirt or debris. The salad is then drained and ready to be served."
跟Aprilmei说的一样,估计各处都是这么洗的。Costco的Spring Mix 号称triple washed。 有人声称自己再手洗未必是好事。