在低覆盖度下，单个乙烯分子占据了短桥位和顶位之间的中间位置。
At low coverage the ethylene molecule occupies approximately the midway between the short bridge and atop sites.
第四纪底砾层直接覆盖在谢桥煤矿煤系地层之上，其隔水性能影响到防水煤柱的合理留设。
The main target coal seam of Xieqiao Mine is directly covered with the Quaternary bottom gravels, whose impermeability affects the reasonable retainment of waterproof pillar.
厚重的灰色苔藓覆盖了它，又黑又粗的黑色藤蔓从水中蛇形而上缠绕着桥拱，它们的重量压垮了它，桥已经半塌了。
Half of them had collapsed, pulled down by the weight of the grey moss that draped them and the thick black vines that snaked upward from the water.
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