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a. 无足迹的, 无路的\\n[法] 无足迹的, 不留足迹的, 无路的
✅ 同义词
🗣️ 情景例句
A table spoon is much bigger than a teaspoon.
汤匙要比茶匙大得多。
This problem is hard to solve.
要解决这个问题不简单。
When he died, however, his brothers found it impossible to keep the secret any longer.
他死后，他的弟弟们才觉得无法再保守这个秘密了。