They have the stimulus right there on the outside of their bodies in order to do the grooming.
它们的身体外部有刺激物来帮助它们梳理毛发。
2
He travelled in a caravan of armor-plated vehicles, and was trailed by bodyguards who were recruited from outside the country, in order to reduce the chance that they were sleeper agents.
他随装甲车队出行，身边跟着的是由国外招来的保镖，这样可以减少卧底的可能。
3
A: We need our order number on the outside of each box.