海底捞针
- na.dredge for a needle in the sea
- 网络to look for a needle in a haystack; fish for a needle in the ocean; hCi dH lAo zhPn

海底捞针
1.dredge for a needle in the sea; fish for a needle in the ocean; hunt [look] for a needle in a haystack; impossible task; look for a needle in a bottle [bundle] of hay; look for a needle in the ocean; try to recover a needle from the bottom of the sea; useless [vain] effort
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