As I understand; based on what I know
私が理解する限り；私が知っていることに基づいて (Watashi ga rikai suru kagiri; watashi ga shitte iru koto ni motozuite)
"As far as I can tell, everything is fine."
"私が理解する限り、すべてが順調です。" (Watashi ga rikai suru kagiri, subete ga juncho desu.)
showing wisdom or maturity greater than expected for one's a...
to support or defend someone
an unpredictable person who may cause problems
an obvious problem that no one wants to discuss
to keep one's plans or intentions secret
To start successfully; to begin operating.
