今日挑戰句子
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They've become an essential part of our food system. As populations have grown, monoculture, single crop farming, has helped us feed people efficiently. But it's also left our food vulnerable to extensive attack by pests. In turn, we've become more dependent on pesticides.
它們已經成為我們食物系統中重要的一環，隨著人口增長，單作（種植單一作物）協助我們有效率地餵養人民，但這也讓我們的食物對廣泛的病蟲害顯得脆弱，轉而，我們更加地依賴農藥。
學習重點
2. efficiently 效率高的
efficiently
[ɪˋfɪʃəntlɪ] (adv.) 效率高的
efficient
[ɪˋfɪʃənt] (adj.) 有效率的
efficiency
[ɪˋfɪʃənsɪ] (n.) 效率
3. vulnerable 易受傷的
vulnerable
[ˋvʌlnərəb!] (adj.) 易受傷的
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