All day long he flies back and forth from his branch to the feeder.
这一整天，他在喂料器和枝桠之间来来回回。
We travel back and forth all the time between Canada and England.
我们总是在加拿大和英格兰两地来回旅行。
But don't let all the back-and-forth fool you.
但是请不要被这些表象所迷惑了。
But don't let all the back-and-forth fool you.
但是请不要被这些表象所迷惑了。
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