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1、in efforts to努力；尽力做
They also announced plans to cooperate in efforts to fight climate change and develop clean forms of energy.
他们也宣布了合作计划，努力对抗气候变化并开发清洁能源的方法。
2、shut down停工；关闭
The aircraft will land safely, and could do so even with the engine shut down.
但不用担心，飞机仍将安全降落，甚至关闭引擎也能做到安全无比。
