课文详注 Further notes on the text
1 .Dreams of finding lost treasure almost came true recently.最近，找到失踌宝旅的梦想差一点儿变成现实。
come true为固定短语，表示“(预言、期望等)成为事实”、“(愿望)实现”:
His dream to travel around the world at last came true.
他周游世界的梦想终于实现了。
2 .The pirates would often bury gold in the cave and then fail to collect it.海盗们过去常把金子埋截在那个洞里.但后来却没能取走。
(1)would在这里不表示过去将来时，而表示过去的习惯性动作，它后面跟动词原形(bury和fail)( cf‘本课语法)
(2)fail to do sth表示“未能”、“不能”或“忘记”做某事:
Don't fail to write to us.
别忘记给我们写信。
He failed to see the reason why they sent him away.
他不了解他们把他打发走的原因。
(3)collect的含义之一为“(去)取”、“接”:
I'll collect my post on my way home.
我将在回家时顺路取我的邮件。
Don't fail to collect me before you go to the party.
去参加晚会之前别忘了接我。
3. Armed with the new machine…用这种新机器装备起来...
arm(ed) with可以表示“带着”、“装着”、“穿着”等:
Don't worry.I'm armed with an umbrella.
别担心，我带着伞呢。
You'd better arm yourself with a warm coat.
你穿件暖和的外衣。
4. the entrance to the cave，洞口。
entrance可以表示“入口”、“大门”等;
I can't find the entrance to the park.
我找不到公园的入口。
Is this the entrance of the park/your school?
这是公园/你们学校的大门吗?
5.Very excited,the party dug a hole two feet deep.队员们异常激动，就地挖了一个两英尺深的坑。
(1)与armed with引导的短语相似，very excited也是过去分词(短语)作状语，表示主语所处的状态:
very worried about his child,he phoned the police.
他为他的孩子非常担心，(便)给警察局打了电话。
(2)deep在表示“有...深”时要位于数字之后:
We have a swimming pool six feet deep.
我们有一个深6英尺的游泳池。
6. ...‘The Revealer’ may reveal something of value fairly soon.
……“探宝器”很快就会探出值钱的东西来。
of 表示其所修饰的名词具有某种性质、状况:
The news is of great importance to us.
这消息对我们非常重要。
Tom is a boy of sixteen.
汤姆是个16岁的男孩。
语法 Grammar in use
would用于表示过去的习惯性动作及其它与usef to的对比
在第7课的语法中，我们学习了用过去进行时表示过去某段时间一直在干什么:
They were preparing for the party for two whole days.
整整两天他们一直在为晚会进行准备。
在第31课的语法中，我们学习了用used to表示过去的习愤。
would是另一个用于描述过去经常性行为的词，它与used to有时可以互换，有时则不可以，而且would需要指出具体时间，used to则不需要。
(1)当used to暗示与现在的对照时.不可用would替换:
I used to drink heavily,but I have given up drinking now.
我过去喝酒很厉害，但我已戒了。
I never used to eat a large breakfast ,but I do now.
我过去早饭吃得不多、可现在我吃得很多。
(2)当used to描写过去的状态时，也不可与would互换，would只
表示过去特有的习惯或行为:
I used to be a waiter,but now I'm a taxi-driver.
我过去是个侍者，但现在我是出租汽车司机。
They used to awn a car.
他们过去有辆车。
(3)当used to不强调与现在的对比时，可与would互换。但一个故事开头时不用would，必须首先用一般过去时或used to描述背景，然后用would表示习惯性动作:
When I was a boy we always spent/used to spend our holidays on a farm.We would get up at 5 and we would help milk the cows.
我小时候经常在农场度假。我们总是5点起床，帮助挤牛奶。