But the model works in emerging markets where order sizes are large and delivery workers' wages low.

但这种模式适用于订单量大、骑手工资低的新兴市场。

Avoid having to get your new ring resized. Order the right size every time by measuring for your correct ring finger size at home.

避免每次都重复确定新戒指的尺寸。在家中量好手指尺寸，购买正确的戒指。

Females inspect the males closely in  order to size up the displays and choose a mate – which can't be easy, since up to 400  male sage grouse may attend a lek at one time.

雌性会仔细检查雄性，以便确定展示的尺寸并选择配偶——这并不容易，因为一次可能有多达 400 只雄性鼠尾草松鸡参加一次 lek。