Dave makes us better in all of these efforts .

戴维让我们在所有这些努力中变得更为出色。

They may work in the background and may even undermine our own efforts .

他们可能隐居幕后，甚至会暗中破坏团队的努力。

In 2014 , please don 't let these efforts be in vain .

所以，进入2014年，请不要让我们的努力白费。

Cisco 's turnaround efforts are starting to pay off -- slowly .

思科（Cisco）重振旗鼓的努力已经开始慢慢奏效。

Sometimes , their efforts may even fail .

有时，他们的努力甚至可能会失败。