hand-on-experience是什么意思

“at hand,in hand,on hand,by hand”分别是什么意思? 求问in/hand,at/hand,on/hand各是什么意思? 请问 hands on experience Memories of two people hand-in-hand experience. hand是什么意思 "dont moveput your hand on your head" 是什么意思? After this experience是什么意思 experience是什么意思,怎么读? lucent work experience 是什么意思? same experience中文是什么意思 at hand,by hand,in hand,on hand,to hand ,with hand on the other hand