他抬起头，望着天空中高耸厚重的积云，又检查了下右手指甲，但就是不能看着我。
He looked up at the piles of towering cumulus, and he examined the nails of his right hand, but he could not look at me.
注汽开采中高温高压蒸汽的频繁注入又加剧了地层出砂，这些状况极大地限制了稠油的有效开采。
In steam injection production, the steam with HTHP can stimulate formation sand production. These statuses restrict the output of heavy oil.
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