why the sudden change的意思|示意

So why the sudden change in the manner of Israel's response to these provocations?

那么为何以色列对待这次挑衅的态度会有如此大的转变呢？

This is believed to be why they march in crowds. By keeping on the move they avoid becoming a meal for a neighbour—surely a powerful incentive for a sudden change of direction, too.

幼年蝗虫相互蚕食的趋势是一种可能性.这一点也被认为是为什么它们会结队前进的原因.它们通过不断的运动以避免成为同伴的盘中餐,当然也成为了行进路线发生突然改变的一大诱因.