/dɪ'mjʊə(r)/ a. Syn. grave; serious (端庄的,认真的,腼腆的) modest and reserved in manner or behavior She was demure and reserved, a nice modest girl whom any young man would be proud to take home to his mother.
/i:və'nɛs(ə)nt/;/ɛv-/ a. Syn. fleeting; vanishing (消散的,凋零的) fleeting; vanishing or likely to vanish like vapor Brandon's satisfaction in his new job was evanescent, for he immediately began to notice its many drawbacks.
/ɪn'ɛfəb(ə)l/ a. Syn. unutterable (不可言喻的,无法用语言表达的,不能说的,避讳的) unutterable; cannot be expressed in speech Such ineffable joy must be experienced; it cannot be described.