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心ゆくまで， 心行くまで， 心ゆく迄， 心行く迄， こころゆくまで
1. to one's heart's content
tbd
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笑う， 嗤う， 咲う， わらう
1. to laugh
2. to smile
3. to sneer, to ridicule
4. to be dumbfounded, to be flabbergasted
笑；微笑；冷笑，嘲弄；冷笑，嘲弄
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
