These companies not only rigorously segment their markets by income level, they also lead consumers up the value chain as they become richer.
在严格地依据收入水平划分市场的同时，引导顾客消费高档产品。
2
As it travels through various points of the supply chain, there are possibilities of this food being exposed to temperatures or other factors that could lead to its contamination.
由于这些蔬菜水果会经过供应链的各个节点，暴露在常温下或者其它因素会导致污染。
3
This may lead to a chain of backup images as shown in Figure 2.