它是一个坚果。
It's important to put a lock washer on that last nut, or it can work loose.
重要的是要在最后一个螺母上安装一个防松垫圈，否则它会逐渐变松。
Squat, homely, dwarfed by the stately oaks and poplars nearby and unnoticed by the tourists passing in horse-drawn carriages, it's a tree that only birds and nut-hungry squirrels could love.
它矮小平凡，旁边高大笔直的橡树和杨树让它相形见绌；坐着马车从它身边经过的游客都不会瞅它一眼，可能只有鸟儿和想吃松子的松鼠会喜欢它。
There are some promising drugs in the pipeline. But it's been a really tough nut to crack.
有一些前景不错的药品已经在研发之中，但要真正实现确实还很不容易。
This is a tough nut to crack. It's going to take some time to figure out.
这是一件棘手的事。要花些时间才能想出来。
Being a weird health nut and outperforming everyone else is so much more fun than blending in — and that's not just athletically. It's mentally as well.
做一个坚持健康饮食的傻瓜，比其他任何人都注重健康，这样做比跟其他人一起吃垃圾食品要好得多——这不仅对你的身体有益，对你的大脑也有益。
高师：这是一种坚果。
Jo: But then things change. I think the squirrel was looking for a nut under the apple tree. We use the here because it's the second mention of the squirrel.
名词第二次出现– 这次我们知道了是哪只松鼠，因为刚才在花园里看到了一只松鼠。
Jo: But then things change. I think the squirrel was looking for a nut under the apple tree. We use the here because it's the second mention of the squirrel.
名词第二次出现– 这次我们知道了是哪只松鼠，因为刚才在花园里看到了一只松鼠。
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