reigning
adj. 统治的；在位的；本届的；起支配作用的
v. 统治；支配；盛行；成为最佳（reign 的现在分词）
例句
"The ancient Hawaiians were astronomers," wrote Queen Liliuokalani, Hawaii's last reigning monarch, in 1897.
1897年，夏威夷最后一位在位君主利留卡拉尼女王写道：“古代夏威夷人是天文学家。”
The sky was dark, stars were twinkling high above, night was reigning, and everything was sunk in silken silence.
天很黑，星很繁，夜阑人静。
《新英汉大辞典》
The reigning language of the day, C + +, was not suitable for this domain.
而当时的主流语言，C++，则并不适合这个领域。
