HSK 7-9
到头来
dàotóulái副
in the end; finally; as a result
他忙了半年到头来一无所获。
Tā máng le bàn nián dào tóu lái yì wú suǒ huò.
After six busy months, he ultimately gained nothing.
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Appears across levels (7-9) in the HSK 3.0 word list.