重點講解：
1. be studded with
布滿…的；有很多…的；
eg. The sky was studded with twinkling stars.
天空滿布著閃爍的星星。
eg. The business history of the past two decades is studded with failed mega-mergers.
在過去20年的商業(yè)史上,失敗的“巨無霸”合并案比比皆是。
2. be low in
成分少的；含量低的；
eg. They look for foods that are low in calories.
他們要找低卡路里的食物。
eg. They are weakened by a diet that is low in protein.
他們?nèi)粘ｏ嬍持械鞍踪|(zhì)含量不足，因而身體虛弱。
3. be poor in
貧乏的；缺少的；
eg. He is poor in money, but rich in knowledge.
他貧于金錢，但富于學(xué)問。
eg. It has come to my notice that he was poor in health.
我注意到他身體不好。
4. if not for
（用于條件句中）如果不是為了，要不是；
eg. If not for John, Brian wouldn't have learned the truth.
要不是因為約翰，布賴恩也不可能知道真相。
eg. The earth would be a frozen ball if it were not for the radiant heat of the sun.
如果沒有太陽輻射的熱量，地球就會變成一個冰球。
5. in abundance
大量；豐富；充足；
eg. Food was in abundance.
食品充足。
eg. But the report has evidence in abundance.
但是報告顯示的證據(jù)十分充足。