2--But are Jonathan and Anna trying to find enemy airplanes? Under the Radar
 
1--Where was Carly this morning? We had the meeting without her.
 
2--Carly? I don't know. I haven't seen her in the office for weeks.
 
1--Maybe she's working on a secret project and that's why she's flying under the radar.
 
2--Well, she had better be careful.
 
1--Because if she flies under the radar for too long, no one's going to miss her when she gets fired.
 
2--Before electronic devices, military aircraft would fly under the radar so they wouldn't be seen by the enemy.
 
1--Today, "to fly under the radar" means to avoid being the center of attention or to go unnoticed.
 
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注解：
 
1.Detection侦查
2.enemy airplanes敌机
3.military军事的

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译文：
 
1--radar（雷达）这个词汇是radio detection and ranging（无线电探测器）的简称。
2--但是，乔纳森和安娜努力找的是敌机吗？低调神秘
1--今天早上卡莉去哪了？我们开会的时候她不在。
2--卡莉？我不清楚。我已经几周没在办公室见她了。
1--也许她正做一个秘密工程，这也就是为什么她低调神秘了。
2--好吧，她最好当心点。
1--因为如果她低调太久，在她被解雇后就没有人会思念她了。
2--在出现电子设备之前，军用飞机都是十分低调神秘的，因此不会被敌军发现。
1--如今，这个短语表示避免成为公众注意的中心，或表示不引人注意。