Arsenal have not moved to sign a new striker since Eduardo's injury, and with Emmanuel Adebayor's future still uncertain, they could be short of fire-power up front early on.

自从爱德华多受伤后，阿森纳还没有签下新的射手，随着埃曼努尔·阿德巴约不确定的未来，阿森纳很可能在前锋线上缺乏火力。

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It's uncertain whether English will be the world language in the future, but we should still keep learning.

未来英语是否会成为世界语言还不确定，但是我们也应该努力学习。

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Glaciologists are racing to understand better how the great ice streams will flow in a warmer world, and the future rate of sea level rise is still uncertain.

地质学家正在努力研究为什么更强的冰流会在更温暖的环境中出现。海平面未来的上升速度依然是个未知数。

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Its future is still uncertain, although it is debating the possibility of independence from Chile.

ECONOMIST: Easter Island

By choosing to pour a ton of money into Twitter today, Apple would pour its confidence in a firm whose future is still uncertain.

FORBES: Apple Won't Buy Twitter, But Google Might

He cautioned that industries faced with the potential disruptions of driverless technology should not move too quickly to a fixed conception, because the future is still very uncertain.

FORBES: How Traditional Automakers Can Still Win Against Google's Driverless Car: Part 5