Both are decent, not the best, but also sometimes have ads.
他们都是规范的，但是都不是最好的，而且它们都有一些广告。
But sometimes math class will also make me a little unhappy.
但有时，数学课也会让我有点不开心。
Players sometimes kick the ball, but they also throw the ball and run with it.
球员有时踢球，但他们也会把球扔出去，然后带球跑。
Sometimes, he would challenge me, but I would also challenge him.
他有时会对我的方法提出异议，我对他也是如此。
He also writes in the name of the market, but sometimes his loyalties conflict.
他声称以市场的名义写作，可是有时又自相矛盾。
But to be fascinated is also, sometimes, to be blind.
但使人着迷的同时也就造成了人们的盲目。
Usually, I am free at the weekends, but sometimes I also have something to do.
周末我通常很闲，但是有时候我也有些事情要做。
But I think sometimes campus love also has advantages.
但是我觉得有时候校园恋爱也是有优势的。
But it can also be very, very difficult - and, sometimes, just a little frustrating.
不过它也可能会很难很难-而且有时候，让人就是觉得有点烦心。
Winning is a good thing, but failure sometimes is also estimable.
胜利是可贵的，而失败有时同样可敬！
Sometimes know it is wrong, but also without hesitation.
有的时候明知道做下去是错的，但是还要义无反顾。
But it also has the disadvantage that sometimes it is not flexible enough.
但是它也有缺点，那就是有时它不够灵活。
But then, sometimes these also can go too far.
但是，有时这也会走得太远。
But let us sad and sometimes touching, but also let us vulnerable.
但感动有时让我们伤感，也让我们脆弱。
Sometimes also in saliva, but not to low concentrations can be spread.
唾液中有时也有，但浓度可以低到不能进行传播。
The little black dog is a loyal defender, but also very naughty sometimes.
小黑狗是个忠诚的卫士，但有时也很顽皮。
But sometimes the natural world also demonstrates just how much power it can summon up.
自然界也不过是间或展示一下它究竟能聚集多大的能量而已。
Sometimes this is scary, but it is also very necessary.
有时候它很胆小，但是这是必要的。
But to be fascinated is also, sometimes, to be blind.
但是令人着迷，有时也会使人盲目。
But to be fascinated is also, sometimes, to be blind.
但是令人着迷，有时也会使人盲目。
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