1·Three years ago, a little painting caused big trouble for undercover agent Bob Wittman.
三年前，一幅小小画作给卧底特工鲍勃·惠特曼带来了大麻烦。
2·After the battle of Salinas, Steinbeck decided to go undercover for months, to research what would become the Grapes of Wrath.
萨利纳斯战斗发生后，斯坦贝克决定去卧底几个月，为《愤怒的葡萄》寻找素材。
3·Meanwhile, in Singapore undercover officers seized several tiger skins that had been advertised for sale online.
同时，新加坡的卧底人员截获了数具用于给在线销售作广告的虎皮。
4·In every undercover operation, there is a tipping point, a moment when the bad guys move from suspicion to trust.
在每次卧底行动中，都有临界点，一个坏人由怀疑到信任的时刻。
5·So I decided to go undercover to collect it, "he said."
所以，我就决定当卧底来收集证据了。