文档介绍：科技英语海洋死区
第1页，共14页，编辑于2022年，星期日
That's bad news for fish — and for the people who eat them. Much of the world's given a financial incentive to plant crops like winter wheat, rather than leaving their fields fallow(休耕)after the fall harvest, much of the nitrogenous fertilizer that would normally get washed into waterways by spring thaws could instead be absorbed into winter grain crops. Measures of this sort, if uniformly implemented, could all but eliminate the Gulf of Mexico's famously ballooning dead changes to farm management aren't likely to be cheap or easy to implement. But, as Diaz's study suggests, the consequences of inaction might prove infinitely more expensive.
第7页，共14页，编辑于2022年，星期日
防止海洋死区的最好办法就是减少流入海洋的氮气。比如，如果美国地势较高地区的农民在财政上予以激励，使其种植像冬麦这样的农作物，而不是在秋收后休耕，这样大多数原本会在春天冰雪融化时被冲到河流中的氮肥就会被冬天种植的农作物所吸收。这种措施如果被统一执行，几乎会消除墨西哥湾有名的扩张死区。但是这样的农业管理转变代价不低，也不容易实施。但正如达艾斯的研究所示，如果不采取任何措施，其后果可能会导致付出更加昂贵的代价。
第8页，共14页，编辑于2022年，星期日
patch /pætʃ/ ；斑；一小块地 ，修补
roughly /ˈrʌfli/ ；毛糙地；概略地
mangrove forest
depletion /di'pli:ʃən/ n. 消耗，逐渐耗尽
teeter / 'ti:tə/ vi. 摇摆，摇摇欲坠，犹豫不决，上下往复的运动n. 翘翘板
detriment /ˈdetrimənt/ ，伤害
susceptible /səˈseptəbəl/ ；过敏的；能经受的
fallow /ˈfæləu/
第9页，共14页，编辑于2022年，星期日
the first paragraph, we can learn that _______.
no living things can be found in dead zones.
there’s no oxygen in the dead zone waters.
the coverage of dead zones is increasing alarmingly.
the phenomenon of dead zone was firstly found by UNEP.
第10页，共14页，编辑于2022年，星期日
’s the impact of dead zones on fishery according to the second paragraph?
A) They caused a great trouble in fish supply.
B)They led to the great decline of fisheries.
C) They reduced the breeding grounds of fish.
D)They would bring more than harm to fisheries.
第11页，共14页，编辑于2022年，星期日
the passage we can learn that the hypoxia in water________.
A)makes the fertility(繁殖力) of fish decrease.
B)directly leads to the death of fish.
C)reduces th