begin (something) energetically and enthusiastically
(积极热情地)开始,着手
he launched into a two-hour sales pitch.他发动了一场两小时的销售宣传。
he launched into a two-hour sales pitch.
他发动了一场两小时的销售宣传。
make a start on a new and challenging enterprise
开创,启动(新而难的事)
she wasn't brave enough to launch out by herself.她没有勇气独自闯荡一番。
she wasn't brave enough to launch out by herself.
她没有勇气独自闯荡一番。