Under manoeuvring condition the main engine may run on _____.

When under maneouvring conditions with the machinery being manually operated the control u

Under normal conditions, the quantity of air circulation becomes less and lessWhat is the

听力原文： Under normal conditions the act of communication requires the presence of at lea

Under what conditions should the bypass operation be performed？A．When a general practition

Under what condition will the strike be called off？A．The gold companies meeting the miners

Our experiment was conducted under optimal condition. The underlined part means ______.（20