早期人类使用更原始的工具进行狩猎。

Early humans used ___cruder tools for hunting.

他在晚宴上发表了粗俗的言论，让在场的人感到尴尬。

His ___cruder remarks at the dinner party made everyone feel awkward.

这个简陋的木桥看起来很粗糙，但还能用。

The ___cruder wooden bridge looks rough but still usable.