Gather ye rosebuds while ye may,
Old Time is still a-flying;
And this same flower that smiles today,
Tomorrow will be dying.(Robert Herrick,English poet,1591-1674)
花开堪折直须折,
流年荏苒逝如飞；
今夕花开犹含笑,
明朝凋零空余枝.(罗伯特·赫里克,英国诗人,1591-1674)
请问第一句中的ye怎么理解呢?