unsparing
adj
~ (in sth) 1giving freely and generously 慷慨的; 大方的
be unsparingin one's efforts 不遗余力.
2 severe or merciless 严厉的; 不留情的
Nijinsky was unsparing in his demands for perfection. 尼任斯基对演技精益求精一丝不苟.
🗣️ 情景例句
The price for one person for a ten-day tour is only $ 1088, which includes round-trip airfare.