benefit from: 受益
The economy now would benefit from some real engineering.
現在一些真正的工程才會令該國經濟受益。
Humans are not the only species to benefit from foxp2.
人類并不是唯一受益于foxp2基因的物種。

flex time: 彈性工作時間
If you want flex time, you'll have to talk it over with your supervisor.
如果你想要彈性工作時間，你可以和你的上司談。
The time that's left over can be your flex time.
剩余的時間你就可以靈活掌握。

come up with: 提出
To come up with more creative and innovative designs?
還是想出更原創性和革新性的設計？
Others strive to come up with something a little different.
其他人力圖想出些有點不同的名字。

pile on: 積累
Another way to reduce both the fat and sodium content of your sandwich is to use less meat and pile on extra veggies instead.
降低你的三明治的脂肪和鹽含量的另一種方法是少食用肉，多堆些蔬菜。
It makes them feel more secure. I say pile on the hugs.
說是能讓他們感到安全，所以我們就去多抱抱孩子。