他整个下午都在仔细研读那本医学教科书。
He ___pored over the medical textbook all afternoon.
热蒸汽有助于打开毛孔，深层清洁皮肤。
Steam helps to open the ___pores for deep skin cleansing.
他熬夜仔细研读那份法律文件。
He stayed up late ___poring over the legal document.
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