这道数学题对我来说很难。
This math problem is difficult for me.
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difficult英 /ˈdɪfɪkəlt/|美 /ˈdɪfɪkəlt/
This math problem is difficult for me.
This math problem is difficult for me.
This math problem is difficult for me.
在 App 中完整学习这张卡片
在 App 中学习