hidden track

基本解释

Defective shunting of track circuit constitutes a huge hidden trouble to the transportation production.
轨道电路分路不良对运输生产构成巨大的安全隐患。
Multi-passive-sensor system draw much attention because of its hidden character, but the track fusion algorithm against its unique property is lack.
多被动传感器系统以其隐蔽特性得到重视，然而缺乏针对其独有特性的航迹融合方法。
That means the black athletes have a "hidden height" that which gives them a significant speed advantage on the track.
这个隐藏高度使他们在跑道上速度占优。

But on an auxiliary (and sometimes hidden) track employees can use a brokerage window to buy thousands of different mutual funds and usually exchange-traded funds and individual stocks, too.
FORBES: Jumping Out The 401(k) Brokerage Window
"Uday's never been one to follow the beaten track and has a sixth sense about spotting hidden opportunities, " says Mahindra, who's been happy to let Kotak run the show and now holds 4% of the bank.
FORBES: Opportunity Knocks