生死关头: an important juncture of life and death; a moment when one's fate hangs in the balance; at the crucial moment of life and death; be a moment [a turning point] of life and death; be a matte
生死未卜: one's life is uncertain.; hard to predict one's chances of life or death; hard to tell whether the person is alive or not; uncertain of one's life; whether one will survive is uncertain
One problem that gave the war department continuing concern was that of securing practical battlefield experience for portions of the army before the whole of it should finally be thrown into a life-and-death struggle . 陆军部经常注意的一个问题，是在全部陆军生死斗争之前，搜集一部分陆军的实战经验。
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This is a life - and - death struggle concerning who will win out 这是一场关系到谁战胜谁的生死斗争。
