to fail to meet expectations or standards
не соответствовать ожиданиям или стандартам (ne sootvetstvovat ozhidaniyam ili standartam)
"His efforts fell short of what was needed to win the competition."
"Его усилия не оправдали того, что было нужно для победы в соревновании." (Ego usiliya **ne opravdali** togo, chto bylo nuzhno dlya pobedy v sorevnovanii.)
to become familiar with something new
a barrier separating nations ideologically or politically
To keep something secret.
to admit or confess responsibility for something
to swear that something is true, often said with sincerity
to make progress or advance