let alone sea birds. 海鸟就更不用说了

116. for hunters with good night vision.
     栖息在此的这群鸬鹚 就像是呆坐着的鸭子
117. In theory.
     跟想的不一样
118. Birds are not a big cat's usual prey,
     鸟类通常不是大型猫科动物的捕猎对象
119. let alone sea birds.
     海鸟就更不用说了
120. And these sisters need to get their eye in.
     这对姐妹需要熟能生巧
121. Catching flying prey in the dark is not easy...
     在黑暗中捕捉飞行的猎物并不容易
122. ..but these lions have acquired the knack.
     但狮子姐妹俩已经掌握了诀窍

来自《行星地球 第三季 第一集 Planet Earth S03E01 海岸》第 119 行