to substitute for someone temporarily
vorübergehend für jemanden ersetzen (vorübergehend für jemanden ersetzen)
"The assistant will sit in for the teacher today."
"Der Assistent wird heute für den Lehrer sit in." (Der Assistent wird heute für den Lehrer sit in.)
to accept and agree on conditions after negotiation
to convey a message or feeling clearly to others
to stay calm and focused in stressful situations
to increase efficiency and output of workers or industries
to prepare a team with the tools or mindset they need
to study or read something carefully