how to juggle?这句话什么意思？

没有上下文，不好说你这个什么意思。

你看看juggle的意思，理解一下

jug.gle

v.（动词）
jug.gled， jug.gling， jug.gles
v.tr.（及物动词）
To keep (two or more objects) in the air at one time by alternately tossing and catching them.
用…玩杂耍，边抛边接：通过轮流抛接使（两个或两个以上物体）同时保持于空中
To have difficulty holding; balance insecurely:
拿不稳，失去平衡：勉为其难地支住；使…勉强保持平衡：
juggled the ball but finally caught it; shook hands while juggling a cookie and a teacup.
尽力使球保持平衡但最后还是接住了它；握手时忙乱地抓着点心和茶杯
To keep (more than two activities, for example) in motion or progress at one time:
同时做：使（如两种以上活动等）同时保持运作或进展：
managed to juggle a full-time job and homemaking.
设法在持家的同时做一份全职工作
To manipulate in order to deceive:
篡改：为了欺骗而歪曲篡改：
juggle figures in a ledger.
篡改分类账上的数字
v.intr.（不及物动词）
To juggle objects or perform other tricks of manual dexterity.
玩杂耍，变戏法：玩杂耍或表演其它需要手的灵巧的戏法
To make rapid motions or manipulations:
迅速移动或操作：
juggled with the