uneatable

The bread, bad enough in the morning, was now positively uneatable; it was so hard that even the strongest jaws could make little impression on it..早上的面包已经够糟糕了，晚饭的面包却变本加厉得坏，根本不能吃，它是如此之坚硬，叫牙口最好的人见了也一筹莫展。

"Crops are the first level in the food chain, " he told SciDev.Net. "When people make it uneatable to certain insects, we need to understand how it might affect the whole ecosystem.".“农作物是食物链中的第一个环节，”他对SciDev.Net表示，“当人们将它变得对某些昆虫而言不可食用时，我们需要了解整个生态系统可能受到的影响。”