As for pick up one, it is up to the personal taste.
如果要挑一个，则是由个人爱好决定的。
Pick up one book each time and replace after reading.
每次只取一本图书，阅览完毕放回原处。
I heard that his wallet was lost. I happened to pick up one yesterday.
我听说他的钱包丢了。我昨天恰巧捡到了一个。
Unfortunately, they only have room to pick up one group of followers on each trip.
不幸地，他们的空间在每次旅行只能带上一群支持者。
Can't you drop one course and pick it up next semester?
你不能放弃一门课，下学期再重新学吗？
He tried to pick one up, but failed.
他试着去捡，但是却根本捡不起来。
I lean forward to pick one up, except that I can't.
我倾身向前想要拿起一个，只是我不能。
A: Good! I'll pick you up around one o 'clock.
太好了！一点钟左右我去接你。
Sound off in the comments if you would pick one up.
如果你也想要的话，就在评论里吱一声吧。
But in the store, you can pick up a new one or tell them it's already ripped.
但如果是在实体店里，你可以另选一件好的或跟店员说这件绽线了。
"The guard will pick him up," one waiter said.
“警卫队会把他逮走，”一个侍者说。
Social media is just one way in which web users pick up on news.
社会化媒体只是网页用户选择新闻的一种方式。
There was only one other person left in line to pick up his.
那里只剩下另外一个人排队来领取他的外套。
Not one person stooped to pick up the garbage.
没有人停下来捡那块垃圾。
That means you'll have to pick up a new one every year or so.
也就是说你每年都得买一个新的充电器。
I have been to the Final once and hopefully one day I can pick it up.
我已经进过决赛一次了，现在我很期待有一天我可以夺得冠军。
If you found a change purse on the playground with quite a bit of money in it and no one saw you pick it up, what would you do?
要是你发现在运动场上有个装着不少钱的钱包而且周围也没有人看着你的话，你会拿走吗？
When you pick up the boys, don't leave that little one out.
你去接孩子的时候，别把那个小的遗漏了。
You can pick one up at virtually any transit station.
所有中转站几乎都可以买到月票。
In one activity, children try to get a robot arm to pick up a block and place it in a cup.
在一个活动里，小孩试图让机器人的手臂捡起一块积木并把它放在杯子里。
Click on one of these to pick it up.
在这些一点击它捡起来。
No. You have to buy your own. You'll have to go to a hardware store to pick one up.
布莱德：没有。你必须自己去买。你将得去五金行买一把锁。
No. You have to buy your own. You'll have to go to a hardware store to pick one up.
布莱德：没有。你必须自己去买。你将得去五金行买一把锁。
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