Terms for subject Cliche / convention containing in that

English	Russian
in reply to your inquiry of ..., we wish to inform you that	на Ваш запрос от... сообщаем
in that regard	на этот счёт (—used to refer to something just mentioned (Merriam-Webster): We will take care of supplying the food, so you have nothing to worry about in that regard. • "Да, Ангела Меркель была права на этот счет." (Франсуа Олланд ) ART Vancouver)
let that sink in	вдумайтесь, что это значит (75k a year income can't get you a rental here at today's rate. Let that sink in. ART Vancouver)