重點(diǎn)講解：
1. rely on 依賴；依靠；
Most poultry farmers have to rely on commercially manufactured feeds.
多數(shù)飼養(yǎng)家禽的農(nóng)場(chǎng)主不得不依賴商業(yè)化生產(chǎn)的飼料y7o6Z+kE9dJ]x7ZX。
2. be desperate to do sth. 極需要的；渴望的；
They are desperate to erase the memory of that last defeat in Cardiff.
他們急于抹去上次在卡迪夫遭遇失敗的記憶@HMeSM,o5ecoh~Xo6。
3. serve as 用作；可當(dāng)…使用；充作；
The Ambassador said he hoped the statement would serve as a wake-up call to the government.
大使說，他希望這一聲明能給政府敲響警鐘5,4J8h0.OfYr&H)zWI。
4. shed light on 使（某事）顯得非常清楚；使人了解（某事）；
A new approach offers an answer, and may shed light on an even bigger question.
新的方法提供了一個(gè)答案，并且可能讓人們對(duì)一個(gè)更大的問題有進(jìn)一步的了解V&7[.v9Z9w。