联赛的市场开发不足。
然而日本对于另一项能源似乎还处于开发不足的阶段，那就是风能。
Yet it does have one that seems under-exploited, namely the wind.
中国对自然资源的需求不断增长，正好与非洲的丰富且往往开发不足的石油矿产储藏互补。
China's growing demand for natural resources is matched by Africa's significant and often under-developed oil and mineral reserves.
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