重點講解：
1. be packed with
充滿…的；富含…的；
eg. The park is packed with a dense crowd.
公園里黑壓壓地擠滿了人。
eg. In spite of the cold, the street was packed with pedestrians.
盡管天氣這么冷，街上還是擠滿了行人。
2. peck at
啄；啄食；
eg. It was winter and the sparrows were pecking at whatever they could find.
時值冬季，麻雀啄食著能夠找到的任何東西。
eg. The birds come and peck at the nuts hung up in the garter.
鳥兒飛出來，啄食花園里掛著的果核。
3. a lump of
一塊；
eg. The girl takes a lump of sugar from the box.
這個小姑娘從盒子里拿了一塊方糖。
eg. She impaled a lump of meat on her fork.
她用叉子戳起一塊肉。