For civilians or for soldiers on the battlefield, however, an SCBA system is nearly impossible to manage because of the expense and the limited air time.

对战场上的平民和士兵而言，由于价格昂贵、气量有限，SCBA系统几乎不可能达到预期效果。

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Mr McGraw says Boeing could have based its design on the bigger 777, but chose the 767 because it takes up less space on the ground, so more aircraft can be placed near the battlefield.

麦克格雷表示，波音公司的方案本来是基于比767更庞大的777的，选择767是因为767在机场占用空间较小，因此能在前线布置更多的飞机。

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But elephants were a rather unreliable weapon because of their tendency to run amok on the battlefield.

但大象在战场上有时会发狂，不是十分可靠的武器。

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But elephants were a rather unreliable weapon because of their tendency to run amok on the battlefield.

但大象在战场上有时会发狂，不是十分可靠的武器。

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