effort：
n.氣力;努力;費(fèi)力的事;艱難的嘗試;試圖;盡力;有組織的活動(dòng)；
復(fù)數(shù)： efforts
例句：
The project has demanded considerable investment of time and effort.
該項(xiàng)目已讓我們投入了相當(dāng)多的時(shí)間和精力。
We need to make a concerted effort to finish on time.
我們需要通力合作才能按時(shí)完成。
The local clubs are making every effort to interest more young people.
地方俱樂部正在盡一切努力來吸引更多的年輕人。