sank
动词 sink:
fall or drop to a lower place or level
cause to sink
同义词:sink
pass into a specified state or condition
go under, "The raft sank and its occupants drowned"
同义词:sink, settle, go down, go under
descend into or as if into some soft substance or place
appear to move downward
fall heavily or suddenly; decline markedly
fall or sink heavily
同义词:slump, slide down, sink
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