at one blast meaning in Chinese

一口气, 一直

I confess i had not entertain d any notion of my ammunition being destroy d at one blast , i mean my powder being blown up by lightning , and this made the thoughts of it so surprising to me when it lighten d and thunder d , as i observ d just now
我得承认，在考虑这些问题时，并未想到火药会被雷电一下子炸毁的危险因此雷电交加之际，忽然想到这个危险，着实使我惊恐万状。这件事我前面已叙述过了。
My very heart sunk within me , when i thought , that at one blast all my powder might be destroy d , on which , not my defence only , but the providing me food , as i thought , entirely depended ; i was nothing near so anxious about my own danger , tho had the powder took fire , i had never known who had hurt me
因为我不仅要靠火药自卫，还得靠其猎取食物为生。当时，我只想到火药，而没有想到火药一旦爆炸自己也就完了。假如真的火药爆炸，我自己都不知道死在谁的手里呢。