'幸亏' highlights a fortunate circumstance, timely intervention, or lucky break; the second clause with '不然/要不' (otherwise) delineates the catastrophic outcome that would have inevitably unfolded without it.
'地步' denotes a precarious stage, plight, or extreme degree. It typically describes a deteriorating situation degenerating to an alarming or irreversible point ('reached the stage where...').
Indicates that despite substantial changes in conditions, external hindrances, or vastly different environments, an action or state persists completely unchanged ('still... all the same / as usual').
Adverb denoting making a resolute, bold, or straightforward decision, cutting the Gordian knot and discarding halfway measures ('simply', 'might as well just').
Emphasizes an unalterable certainty or definitive reality that remains true regardless of hypothetical variables or resistance ('anyway', 'in any case').
Verb meaning to covet, seek after, or aim purely for immediate convenience, cheapness, vanity, or gratification ('pursue', 'be after', 'do sth purely for').
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