不辞劳苦; 十分尽力; 向…告别; 失掉
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1. 向...告别：leave out 忽略,遗漏;省略 | take leave of 向...告别 | at length 最后,终于
2. 告别：take leave of 不辞劳苦 | take leave of 告别 | take liberties with 随意对待
3. 不辞劳苦：take leave of one's senses 发疯 | take leave of 不辞劳苦 | take leave of 告别
4. 向...告别,告辞：830take leave向...告别,告辞 | 831take leave of向...告别,告辞 | 832take one's stand表明立场、意见等