not to know what nerves are
to keep cool; to keep a cool head
to keep cool; to keep a cool head
- sự điềm tĩnh: steadinessimperturbationsobrietysobernesscomposurecalmnesscalm
- tính điềm tĩnh: imperturbablenessimpassivityequabilitycomposednessimperturbabilitynervelessnessimpassiveness
- tính cách không điềm tĩnh: an unballasted character