The maxillary processes extend in a cephalad direction form the piriform aperture to the lacrimal crest, uniting with the frontal and nasal bones.是什么意思_The maxillary processes extend in a cephalad direction form the piriform aperture to the lacrimal crest, uniting with the frontal and nasal bones.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句