But it is the Mayan calendar that is causing people to worry.
但是就是这些玛雅人的历法使人担忧。
But this frenzy of activity is causing some alarm.
但这些狂热的行为敲响了警钟。
But there is almost certainly a further factor causing stress on the bees-a poor diet.
但几乎肯定的是，蜂群的生存压力有其更深层次的原因——营养不良。
But now it's gathering dust, and maybe even causing you heartache.
但现在你都好久没用，都生飞尘了吧，也许都让你头疼了。
But Queensland and Western Australia are causing the most excitement.
但是昆士兰州和西澳大利亚如今却是最让人兴奋的地方。
Some things, very beautiful, also very own treasure, but they still lost, causing regret.
有些东西，很美好，自己也很珍惜，但最终仍会失去，造成遗憾。
But, we need to find out the causing reasons at first.
但是，我们首先需要找出其原因。
But the biggest debris-causing event took place in January, two thousand seven.
但是，最大的碎片产生事件是发生在2007年一月份。
But the biggest debris-causing event took place in January, two thousand seven.
但是，最大的碎片产生事件是发生在2007年一月份。
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