As I understand; based on what I know
Насколько я понимаю; исходя из того, что я знаю (Naskol'ko ya ponimayu; iskhodya iz togo, chto ya znayu)
"As far as I can tell, everything is fine."
"Насколько я понимаю, всё в порядке." (Naskol'ko ya ponimayu, vsyo v poryadke.)
raining very heavily
in the same situation or facing the same challenges
to cause trouble or create a significant impact
To fit perfectly.
to lose one’s temper completely
to fall deeply in love with someone
