not to know the whereabouts of sb.
... 不注意的,大意的,卤莽的,不顾后果的：reckless 不知下落;失去联系/跟踪;密切注视…的动向：lose/keep trace/track (of) 不在乎的;不顾后果的：recklessly ...
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... lose one’s head: 焦炙失踪措 lose track of: 不知下落 make away with: 抢走 ...
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其他5个头像是龙，蛇，羊和狗，还仍然不知下落，有可能已经毁坏，使得兔和鼠成为全套最后剩下的部分。
The other five heads — the dragon, snake, goat, rooster and dog — remain unaccounted for and were possibly destroyed. That makes the rabbit and the rat the last remaining pieces of the set.
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