必要时

At a pinch it can be used as a weapon.

时可以把它当作武器。

Should make the patient maintains lukewarm thaw quiet, can give when necessary tranquillizer and aconite.

应使病人保持温暖和，时可给以镇剂和止痛剂。

He was instructed to inspect the cargo on the ship and detain such cargo if necessary.

他奉命去检查船上所载货物并于时扣留该项货物。

As these patient are often hypoxemic and acidotic, respiratory alkalosis can be induced as a temporizing measure, until the drug of choice sodium bicarbonate (Class IIa) can be used.

低血压应该给于补液，时给于拟交感神经药（或酚丁）。