重點講解：
1. be laden with
裝滿的；滿載的；
eg. The following summer the peach tree was laden with fruit.
第二年夏天桃樹就結滿了桃子。
eg. The air was laden with spices - the mingled fragrance of many grasses and flowers.
空氣里蕩漾著芳香，很多花草混和在一起的芳香。
2. be unique to
獨有的；特有的；
eg. No one knows for sure why adolescence is unique to humans.
沒有人確切地知道為什么只有人類才會經歷青春期。
eg. They are unique to the highlands of Ethiopia.
它們是埃塞俄比亞高地所特有的。
3. be about to do sth.
即將（做…）的；快要（發生…）的；
eg. As she was about to speak, I frowned her down.
她剛要開口，我就皺皺眉示意她別出聲。
eg. The makers are about to launch out a new product.
制造商們馬上要生產一種新產品。