提示：点击例句中的单词，就可以看到词义解释

His headache has departed ; his every sense seem to have gained keenness .

他头不疼了，於是他的每个感官又恢复了敏锐。

The scabbard is content to be dull when it protects the keenness of .

刀鞘保护刀的锋利，它自己则满足於它的迟钝。

His headache had departed ; his every sense seemed to have gained keenness .

他头不疼了，于是他的每个感官又恢复了敏锐。

The razor-blade is proud of its keenness when is sneers at the sun .

剃刀的刀口以它的锋利自傲，当它向太阳嘲笑时。

The scabbard is content to be dull when it protects the keenness of the sword .

刀鞘保护刀的锋利，它自己则满足于它的迟钝。