Electiveness
选修制
🗣️ 情景例句
This is more than I can bear.
我再也受不了了。
A man can never thrive who had a wasteful wife.
妻子浪费无度，丈夫不会出头。
His telescopic observations are justly immortal;
伽利略用望远镜所作的观察确实是不朽的，