line 1 swum -> swimming
line 1 a good luck -> good luck
line 2 is near -> was near
line 2 will be vital -> would be vital
line 2 are in danger -> were in danger
line 3 which suffer -> who suffered
line 3 There is no wonder -> no wonder
line 5 its quick -> their quick
line 6 exact -> exactly
是 telling 不要改
line 7 each other for -> each other of
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