重点讲解：
1. compare to 比较；对比；
Note how smooth the skin of the upper arm is, then compare it to the skin on the elbow.
请注意上臂的皮肤是多么光滑，然后把它和肘部的皮肤比较一下zeQC^x[~@spAHA_e=#N。
2. date back to 追溯（到）；开始（于）；始造（或建）（于）；
It is said that the term probably can date back to feudal Japanese times.
据说这个词可以追溯到日本的封建时期KCWqz=Ct%0KQ。
3. show up 出现；
Keep in mind that it might take a minute or so for a newly added message to show up in the queue.
请记住，新添加的消息出现在队列中可能要花费一分钟左右4Fg=fAa.mC。
4. all along 一直；
You are probably right all along.
也许你一直是对的Nq_QfbI04(M。