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دبلومة البكالوريا الدولية · IB Diploma · Environmental Systems and Societies · HL الموضوع 5 1:05 سرد باللغة الإنجليزية · ترجمة مدمجة بالإنجليزية + الصينية
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النص الصوتي
These are selected topics, not the whole syllabus, and every example is fictional.
这些是精选主题,不是完整大纲,所有例子都是虚构的。
Compare farms by yield per hectare, and remember that renewable resources can still run out.
用每公顷产量比较农场,并记住可再生资源也可能耗尽。
Farm A harvests 18 tonnes from 6 hectares; farm B harvests 20 tonnes from 10.
A 农场 6 公顷收获 18 吨;B 农场 10 公顷收获 20 吨。
B has the bigger harvest, but per hectare A yields 3 tonnes and B only 2.
B 总产量更大,但每公顷 A 产 3 吨,B 只有 2 吨。
Even so, a high yield is not proof of healthy soil: erosion and water demand belong in the comparison too.
即便如此,高产也不能证明土壤健康:侵蚀和用水也要纳入比较。
A fish stock regenerates.
鱼类资源会再生。
If the harvest stays below its regeneration rate, the stock holds steady.
捕捞低于再生速度时,资源量保持稳定。
If the harvest exceeds renewal, the stock falls year after year, even though it is renewable.
捕捞超过更新速度时,资源量逐年下降,尽管它是可再生的。
Renewable means it can regenerate, not that it always keeps up.
可再生指能够再生,不是总能跟上消耗。
Check yourself.
自我检测。
28 tonnes from 7 hectares is 4 tonnes per hectare.
7 公顷 28 吨,每公顷 4 吨。
Yes: a renewable resource is depleted when use exceeds regeneration.
可以:消耗超过再生时,可再生资源也会耗尽。