trem·u·lous
adjective/ˈtremjələs/
/ˈtremjələs/
(literary)- shaking slightly because you are nervous; causing you to shake slightly
（因紧张）颤抖的，战栗的；使打战的；使颤动的 - a tremulous voice
颤抖的声音 - He was in a state of tremulous excitement.
他激动得直发抖。
Word Originearly 17th cent.: from Latin tremulus (from tremere ‘tremble’) + -ous. - a tremulous voice