Part of her training as a pilot involved learning to fly by instruments. 作为飞行员，她训练的一部分就是学习如何靠仪表飞行。The days and weeks seem to fly by.一天天一周周似乎飞逝而去。Airplane pilots must always fly by the book.飞行员应按规则飞行。Hours can fly by as I write, and I don't even notice.我写作的时候时间过得飞快，我甚至都没有察觉到。