课文详注 Further notes on the text
1． flew off course,飞离航线。
off表示“偏离”，为介词：
Our office is off the main street.
我们的办公室不靠大街。
During the storm, the ship went off course.
在暴风雨中，船驶离了航线。
2． her two baby daughters, 她的两个女婴。
baby在这里是形容词，指“幼小的”。
3． Snow Iay thick on the ground.地上积着厚厚的雪。
lie表示“处于某种状态”时，后面常跟形容词或分词：
When I saw her yesterday, she lay ill in bed.
昨天我见到她时，她正卧病在床。
The old man lies ill and neglected in bed.
老人卧病在床，无人照管。
4．The woman kept as near as she could to the children…这位妇女尽可能地靠近孩子……
keep在这里表示“保持（某种状态）”。 as…as one can/could和 as…as possible同义，都表示“尽可能……”：
He got through as much food as he could and set out.
他吃了尽可能多的食物，然后出发了。
Tell Jim to come to my office as soon as he can.
让吉姆尽快到我的办公室来。
5. She stamped out the letters‘SoS’ in the snow.她在雪地上踩
出了"SOS"这3个字母。
out在这里为副词，表示“出现”、“显露”等：
The writer has brought out another book.
这位作家又出版了一本书。
He wrote out a long list of all the foods which were forbidden.
他开列一张长长的单子，上面列了所有禁吃的食物。
6. It was not long before a helicopter arrived on the scene to rescue the survivors of the plane crash. 不久，一架直升飞机飞抵飞机
失事现场，来搭救这几个幸存者。
（1）to引导的不定式为目的状语。
（2）It was not long before…为固定句型，表示“不久就……”（也可以用 It will not be long before…表示将来可能发生的事），
其含义与before long（不久）相近，只是before在课文这个句型中是连词，而在before long中为介词：
It was not long before they learnt the news.
他们不久就知道了这消息。
It will not be long before he gets over his illness.
他大概不久就会痊愈。
词汇学习 Word study
1．可以表示“变成”的一些动词
grow, turn, go, get, come, fall等动词均有“变成”的意思，但它们在用法上有时有差别。
（1）grow表示“（逐渐）变得”，比get要正式些：
He has grown fat.
他长胖了。
He has grown to like studying mathematics.
他渐渐喜欢学数学了。
It was growing hot.
天渐渐热了起来。