Русско-английский научно-технический словарь
обязательно
см. тж. не обязательно
• The equipment used with these systems must necessarily be small.
• Were the DNA molecule to participate actively in metabolism, it would of necessity undergo ... (биол.).• Future experimental programs are certain to include such searches.
• It is imperative that the plating operation be closely controlled.
• Be sure to adhere to the steps specified in the instructions.