With a low-pitched rumbling noise, the propeller began to rotate.
伴随着隆隆的低沉噪声,螺旋桨开始旋转起来。
He kept his voice low-pitched in case someone was listening.
他把声音放低以防被人听见。
英汉双解词典包含141091条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。