arge amounts of iridium； and at the same time atmospheric currents would carry this material all over the globe。 大氣層中行星撞擊形成的碎片可能含有大量的銥元素，與此同時，大氣的氣流會把這些銥帶到地球的每個地方。
同義 ruin； remains（n。 廢墟，殘骸）；fragment（n。 碎屑，散落的碎片）
deceive［di'si：v］v。 欺騙
例句 We may be deceived by the figure since over 80 percent of the world's freshwater is locked up as ice in glaciers。 我們可能被這個數字欺騙了，因為世界上80％的淡水都是以冰的形式凍結在冰川中的。
deplete［di'pli：t］v。 使枯竭，耗盡；倒空；消耗
例句 1。 Except for being depleted in volatile elements； chondritic meteorites are probably very similar in the matter which makes up planets。 除了缺乏揮發性元素外，球狀隕石的組成物質與行星十分相似。
2。 The meteorite is depleted in the most volatile elements； like hydrogen and carbon。 這顆隕星耗盡了大部分的揮發性元素，比如氫氣和碳。
3。 Some plants can bear relatively low levels of certain minerals； but they are of little use for recycling nutrients back into depleted soils。 某些植物能夠忍受某些特定礦物質的較低含量，但這些植物幾乎無法將營養供給到貧瘠的土壤中迴圈再用。
同義 exhaust（v。 使枯竭，耗盡）
depletion［di'pli：？n］n。 削減，消耗
例句 1。 The depletion of the ozone layer over the Arctic region has reached an unprecedented level — a loss of 40％ from the beginning of the winter to late March in 2011。 從冬天開始到2011年三月下旬，南極地區的臭氧層減少了40％——這已達到一個空前的水平。
2。 In modern agriculture； mineral depletion of coal is a major concern。 在現代農業中，煤炭資源的消耗是最令人擔憂的。
3。 The black loams of the prairies were tempting to New England farmers working their rock and to southeastern farmers plagued with soil depletion。 大草原提供了誘人的黑色土