internal optical parametric oscillation内光学参量振荡
internal optical density内光密度，内光学密度
internal operation ratio内部操作比
internal operation内表面加工
internal oleyl sulfate内油醇硫酸酯
internal olefin内烯烃
internal occipital crest枕内嵴
internal obturator nerve闭孔内肌神经
internal oblique muscle of abdomen腹内斜肌
internal object内部对象，内部目标
internal number system内部计数制
internal number内部编号，内部数
internal normalization内标归一化法
internal noise source内噪声源
internal noise内部噪声，内噪声
internal nephrostome内肾口
internal navigation内河航行
internal nasal bud内鼻芽
internal nasal branches鼻内支
internal nares内鼻孔