grit grard

例句：

1. 1. The road was so slippery that it was difficult to get the car moving.
   这条路太滑了，很难让车动起来。
2. 2. The climb was grueling, but she persevered and reached the summit.
   这次登山很艰苦，但她坚持下来了，最终到达了山顶。
3. 3. The old man had a lot of grit to keep going when he ran out of energy.
   这位老人在耗尽能量后，拥有很多坚韧不拔的精神。