nut

Almonds and walnuts are a great source of protein for people who don't eat meat.

(Chinese) 对于不吃肉的人来说，杏仁和核桃是极好的蛋白质来源。

The squirrel spent the entire afternoon gathering nuts to store for the winter.

(Chinese) 松鼠花了一整个下午收集坚果，为冬天做储备。

The mechanic used a wrench to tighten the hexagonal nut onto the rusty bolt.

(Chinese) 机械师用扳手将六角螺母拧紧到生锈的螺栓上。

Make sure the nut is secured tightly so the wheel does not wobble while driving.

(Chinese) 确保螺母固定牢固，这样行驶时车轮就不会晃动。