易混淆的单词： Deadfall

Same principle as the deadfall .

和陷阱的道理是一样的。

To check that their high-tech air measurements weren 't somehow being fooled , wofsy 's group strapped calibrated steel bands around trees to measure their growth , gathered and weighed deadfall , and set up bins to collect fallen leaves .

为了验证他们的高科技空气测量设备不会在某种程度上犯错，沃夫斯的小组用校准的钢带围住树身来测量它们的生长，收集并称量倒伏枯死的树干，设立垃圾箱收集落叶。