What's the difference between "try to do sth."and "try doing sth."

What's the difference between "try to do sth."and "try doing sth."

try to do尽量,努力做某事 类似于try one's best to do sth
try doing sth 试着做某事 尝试做 仅是尝试 暗含不成功就放弃的意义