Try and has several limitations that try to does not. It can't, for example, be used in inverted constructions. "To stop them is our goal" is …
try verb (ATTEMPT) Add to word list. A2 [ I or T ] to attempt to do something. 试图，想要；设法，努力. Keep trying and you'll find a job …
Use 'try to' if you're writing formally. Despite being a colloquialism, 'try and' is ungrammatical. If you're writing informally, then 'try …
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