1.approve vt.赞同, 核准, 为...提供证据
例句：The construction project has been submitted to you, please examine and approve it soon.
施工计划已呈送你处，希望早日得到审批。
2.register vt.记录, 注册, 提示, 表达, 把...挂号
例句：All the guests should register at the reception desk before entering the hall.
所有访客应该在接待台登记后再进入大厅。
3.provoke vt.激怒, 惹起, 诱导
例句：Don't provoke him now, he is angry now.
你现在可别去惹他，他正一肚子邪火没地方发呢。
4.invasion n.侵犯, 侵入, 侵害
例句：The soldiers, massed along the river bank, were ready for the invasion.
士兵集结在河岸，准备入侵。
5.sympathy n.同情, 赞同, 怜悯, 慰问, 吊唁
例句：With a fraction of sympathy, we would reap double gratitude.
我们付出一份同情心，收获的将是双倍的感激。
6.release vt.释放, 解除, 放松, 豁免, 免除, 发布, 放弃, 让与
例句：They will talk to an intermediate before they release the results.
他们在公布结果前要先和中间人谈谈。
7.initiative n.主动行动, 首创精神, 主动权
例句：As a result of a downsizing initiative and a major bank merger, his usually well-ordered life became fraught with changes.
由于一次裁员行动和一次重大的银行合并，他一贯有条不紊的生活变得充满了变化。
8.enforce vt.强迫, 执行, 坚持
例句：We must strictly enforce the factory rules and allow no one to use public office for private gain.
一定要严肃厂纪，不能假公济私。
1.Environmental activists worry that some kinds of fish are in danger of dying out.
in danger of有…的危险
例句：This animal is in danger of extinction.
这种动物濒临灭绝。
die out熄灭, 平息, 消失
例句：Those species inadaptable to changing conditions may die out.
那些不能适应变化中的环境的物种可能会灭绝。
2.Many of the animals die when people harvesting other kinds of fish pull in sharks by accident.
by accident偶然
例句：I found out he was seeing another woman by accident, when a letter fell out his pocket.
从他口袋里掉出了一封信，这让我无意中发现他正和另一个女人交往。
3. During this period, there was an average of sixty-three attacks worldwide each year.
average用作名词有以下意思：
(1) 表示“平均”、“平均数”，是可数名词。如：
The average of 6，8 and 10 is 8. 6，8，10的平均数是8。
An average of 10 students are absent each day. 平均每天有10个学生缺席。
It’s said thatthe paper receive an average of nearly 100 articles a day. 据说这个报社平均每天要收到百来篇来稿。
(2) 表示“普通”、“标准”、“平常”等（大致相当于“一般水平”的意思)，根据情况可用作可数或不可数名词。如：
Tom’s work atschool is above (the) average, Jim’s is below (the) averageand Jack’s is up to (the) average. 汤姆的学习成绩属于中上水平，吉姆的学习成绩属中下水平，杰克的学习成绩属中等水平。
(3) 表示“平均起来”、“在一般情况下”，可用 on average, onan (the) average。如：
On (the) average we receive ten letters eachday. 我们平均每天收到10封信。
He smokes 20 cigarettes a dayon an average. 他平均每天要抽20支烟。(from www.nmet168.com)
4.Some divers interfere with sharks on purpose.
on purpose故意
例句：I was making a general reference, it was really not aimed at you on purpose.
我这是泛指，决非故意针对你。
5.The shark then bleeds to death on the bottom of the ocean.
bleed to death因流血过多致死
例句：The wounded soldier could have been saved if he had not been left to bleed to death on the battlefield.
那名伤兵若不是被遗弃在战场上失血过多而身亡的话，他本来是可以得救的。
1.The International Shark Attack File describes shark attacks as either provoked or unprovoked.
either or用法
用于连接两个表示选择关系的名词或代词，意为“要么……要么”。如：
He must be either mad or drunk. 他不是疯了就是醉了。
You can go swimming or play tennis. 你可以去游泳也可以去打网球。
Either you or I am wrong. 不是你错了就是我错了。
Are either you or I wrong? 是你错了还是我错了?
说明：通常应连接两个相同性质的句子成分，但有时后一成分可能省略与前一成分相同的词。若连接两个成分作主语，其谓语通常与靠近的主语保持一致。如：
You can either have tea or coffee. 你喝茶也行，喝咖啡也行。
Either you or I am wrong. 不是你错，就是我错。
2. The numbers of basking sharks have been decreasing for the past half-century.
现在完成进行时
(1)表示从过去某时开始一直持续到现在的动作，并且还将持续下去。
The Chinese have been making paper for two thousand years.
中国有2000年的造纸历史。（动作还将继续下去）
I have been learning English since three years ago.
自从三年前以来我一直在学英语。（动作还将继续下去）
(2)表示在说话时刻之前刚刚结束的动作。
We have been waiting for you for half an hour.
我们已经等你半个钟头了。（动作不在继续下去）
(3)有些现在完成进行时的句子等同于现在完成时的句子。
They have been living in this city for ten years.
They have lived in this city for ten years.
他们在这个城市已经住了10年了。
I have been working here for five years.
I have worked here for five years.
我在这里已经工作两年了。
(4)大多数现在完成进行时的句子不等同于现在完成时的句子。
I have been writing a book.（动作还将继续下去）
我一直在写一本书。
I have written a book.（动作已经完成）
我已经写了一本书。
They have been building a bridge.
他们一直在造一座桥。
They have built a bridge.
他们造了一座桥。
(5)表示状态的动词不能用于现在完成进行时。
I have known him for years.
我认识他已经好几年了。
I have been knowing...
这类不能用于现在完成进行时的动词还有：love爱，like喜欢，hate讨厌，等。