adj.天翻地覆的，大混乱的
vt.使混乱，闹成天翻地覆
n.天翻地覆、无法可施的状态，一时的混乱
It is to be expected that an experiment will sometimes run into a snag at first.
开始试验时有时不很顺手,也是很自然的.
There is just one small snag—where is the money coming from?
只有一个小问题—钱从哪儿来？
The only snag is, I can't afford it!
惟一的困难是, 我付不起这钱!
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