知道他们竭尽全力去克服困难，我们很高兴。
We were glad to know that they tried to
defend themselves against
defend themselves against
the difficulties with all their efforts.【答案】defend themselves against
【解答】
【点评】
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发布：2024/5/23 20:38:36组卷：1引用：2难度：0.5
