ulerr可以拼成：ruler
n.统治者;支配者;直尺
复数： rulers
例句：
He was a weak-willed and indecisive ruler.
他是一位意志薄弱、优柔寡断的统治者。
All the citizens trusted him because he was a just ruler.
所有的市民都信任他，因为他是一位公正的统治者。
Her brother is the king, but she is the effective ruler.
她的兄弟是国王，但她才是实际的主宰者。
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