per·ceiv·able /-ˈsɪvəbəl/ 形容詞
Per·ceiv·a·ble a. Capable of being perceived; perceptible. -- Per*ceiv*a*bly, adv.
adj 1: capable of being perceived especially by sight or hearing;
"perceivable through the mist"
2: capable of being apprehended or understood [syn: apprehensible,
intelligible, graspable, understandable]