只需一个精子就可以使卵受精。
让我们希望他们足够聪明，不要被一个声称只需按动开关就能确定真实性的机器愚弄。
Let's hope they're wise enough not to be fooled by a machine that claims to determine truthfulness at the flip of a switch.
例如，亚利桑那州立大学的一个研究小组最近称，只需3000美元就能把他们开发的小型立方体卫星送入轨道。
For instance, a research group here at Arizona State University recently claimed their developmental small CubeSats could cost as little as $3,000 to put in orbit.
一个月饼的成本最多只需要两元或者三元。
他们开始在一些电影院取代现场管弦乐队，而且只需要一个人来演奏一个风琴。
They were starting to replace live orchestras in some movie theaters, and it only takes one person to play an organ.
现在消费者只需在移动设备上的支付宝应用程序中输入一个简短的密码就可以支付商品，而不是用现金支付。
Instead of paying by cash, customers now pay for goods simply by typing a short password into Alipay app on their mobile devices.
我对你们的一个要求是：如果你不做、不参与，只需要保持安静。
One thing I do ask you: If you are not doing it, if you don't participate, simply just keep quiet.
你只需一英镑就可在我行开立一个账户。
《神经元》杂志上的一项新研究表明，一个人只需六周的艰苦训练就能获得超强的记忆力。
New research in the magazine Neuron suggests that a person will get a super memory with just six weeks of hard training.
他说：“当人们处在一个只需要敬礼而不需要做自己的环境中时，会让人精疲力竭、失去活力。”
"It's draining and de-energizing when people are in an environment and they just have to salute and not be themselves," he says.
这只需要不到一个小时的时间，而且不需要花费任何费用。
我们只需要弄到票和一个房间。
有消息称说她只需要一个装水的罐子和一些画画用的铅笔。
The information says she'll need just a jar for water—and some pencils for drawing.
所以你只需要在第二学期报名注册一个论文研讨会就可以了。
So you'll just enroll in a thesis seminar for the second semester.
你只需要找到一个合适的地方，先和你的朋友练习几个小时，然后尝试一下！
You just need to find a suitable place, practice for a few hours with your friends first, and give it a try!
只要一个人相信自己，他就只需要一点点运气，所有的梦想就都有可能实现。
If one believes in himself, all he needs is just a little bit of luck to fulfill all his dreams.
足球只需两只脚和一个球。
只需要一个垃圾袋和一副手套！
只需要花一点点钱，你就可以进入一个这样的群聊。
如果你生活中只有一个任务箱，只需抛一个球，只需转一个盘子呢？
What if your life had only one bin, one ball to juggle, one plate to spin？
我们只需要收割它们，然后在一42加仑（160升）的桶中种植一大批，这样我们就能把它们洒在一个食物丰富的环境里。
We just harvest them and grow a bunch in a 42-gallon (160-liter) barrel, so we can spray it out in a food-rich environment.
如果你打算真正的攀岩，你需要一些设备，我们知道一个很不错的攀岩用品商店，从这里步行只需要五分钟。
If you're planning on doing some serious climbing and you need some equipment, we do have an excellent climbing supplies store just five minutes' walk away.
现在开车到最近的城镇只需要一个小时。
我们只需要一个，但是第一个在我完成之前就损坏了，所以我正在做一个新的。
We need only one, but the first one became damaged before I could finish it, so I' m working on a new one.
为了告诉你这只需要毅力，我要给你讲一个故事。
To show you that it only requires perseverance, I will tell you a story.
我们只需要给每个产品一个特定的数字并打印出来。
We only need to give each product a specific number and print it.
现在他们只需要一个小时的车程就可以到达最近的城镇。
盒子可能只需要两个小时就满了，再过一个小时就可能又空了。
It might only take two hours for the box to be full and next hour it might become empty again.
如果你每天都这样做，只需要几分钟，你就能以干净整洁的办公桌开始每一个新的一天。
If you do it every day, it will only take a few minutes and you can start each new day with a clean and tidy desk.
从那以后，他觉得自己发现了一件神奇的事：要让一个男孩想要什么东西，你只需要让那个东西变得很难得到！
He thinks he has discovered something wonderful since then: to make a boy want something, all you have to do is make that something hard to get!
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