unsure

lacking or indicating lack of confidence or assurance

缺乏自信的缺乏或表示缺乏信心或保证的

uncertain of his convictions

不确定他的

unsure of himself and his future

对自己和未来不确定

moving with uncertain (or unsure) steps

以不确定（或不确定）的步骤移动

an uncertain smile

不确定的微笑

touched the ornaments with uncertain fingers

用不确定的手指触摸装饰品

uncertain

incertain

lacking self-confidence

缺乏自信

stood in the doorway diffident and abashed

站在门口，惶恐不安

problems that call for bold not timid responses

需要大胆而不怯懦回应的问题

a very unsure younan

一个非常不自信的年轻人

diffident

shy

timid