流行音乐并不一定是劣质的东西，它可以是艺术。
长寿并不一定是指年长的时间更长。
在学校交朋友可能有点棘手——但它并不一定是这样的！
Making friends at school can be a little tricky—but it doesn't have to be!
这并不一定是一个问题，这是一种进步。
恐龙的消失并不一定是由天文事件引起的。
The disappearance of dinosaurs is not necessarily caused by astronomical incidents.
这并不一定是一种新趋势，但多少有点令人费解。
This is not necessarily a new trend, but it is a somewhat puzzling one.
太平洋海啸预警中心的公告称，“海啸是一系列的波浪，第一波并不一定是最大的。”
"A tsunami is a series of waves and the first wave may not be the largest," said a bulletin from the Pacific Tsunami Warning Centre.
我假设它的并不一定是老鼠操场？
I'm assuming that it's not necessarily a playground for the mice?
大家还要记住，任务膨胀并不一定是坏事。
It should be noted that task inflation isn't necessarily a bad thing.
所以先验的并不一定是正确的。
学习当然并不一定是指意识学习。
Learning, of course, doesn't necessarily imply consciousness.
而这并不一定是坏事。
而短并不一定是捷径。
不过可能这并不一定是坏事。
“安全”和“僵化”并不一定是同义词。
这种游戏并不一定是自恋。
不过这并不一定是件坏事。
但这并不一定是正确的。
尽管我们都知道，并不一定是行数越多越好。
We all know, though, that it's not necessarily true that the more lines you write, the better.
这并不一定是灾难。
你所看到的问题并不一定是其他人看到的问题。
The problems you see may not be the same problems that other people see.
但是，学习训练集表现良好并不一定是件好事。
But learning the training set well is not necessarily the best thing to do.
但是，让我说清楚，失败并不一定是缺少成功。
Let's be clear, however, that failure is not necessarily a lack of success.
但并不一定是那样！
那个在牌局中竖排最多的并不一定是打得最烂的。
The one who loses the most in a poker game is not the worst hand.
这并不一定是要你大动干戈地全面改变自己的生活。
This doesn’t necessarily have to involve full-on, life changing, epic events.
但是您曾经说过增加教学时间并不一定是个好主意。
But in your work, you've indicated that increasing instructional time isn't necessarily a good idea.
但是您曾经说过增加教学时间并不一定是个好主意。
But in your work, you've indicated that increasing instructional time isn't necessarily a good idea.
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