Pentavalency
五价
🗣️ 情景例句
World fashion used to be dictated almost entirely by the European designers.
世界时间潮流过去几乎都是由欧洲设计师所引导的。
He likes playing the organ.
他喜欢拉风琴。
All this was comparatively slow until, with the coming of science, the tempo was suddenly raised.
所有这些发展都比较缓慢，而随着科学的到来，增长的速度才突然加快。