Stubborner
stubborn（顽固的, 固执的）的比较级形式
🗣️ 情景例句
It probably means he's clearing his throat.
也许表示他正在清喉咙。
Congratulations on your recovery.
我恭喜你复原了。
In man's early days, competition with other creatures must have been critical.
在人类早期，人类与其他生物的竞争一定是必不可少的。