用粉笔写

She saw Cary bending down there writing something on the ground with a piece of chalk.

她看见卡里蹲在那里，用一支粉笔在地上写着什么。

Then he knelt by the fire and painfully wrote something upon each of these with his "red keel"; one he rolled up and put in his jacket pocket, and the other he put in Joe's hat and removed it to a little distance from the owner. And he also put into the hat certain schoolboy treasures of almost inestimable value -- among them a lump of chalk, an India-rubber ball, three fishhooks, and one of that kind of marbles known as a sure 'nough crystal.

然后他就在火堆旁跪下，用他那块红砚石在树皮上吃力地写了几个字；他把一块卷起来，放到上衣口袋里，另一块放在乔的帽子里，他把帽子挪远了一点后又在里面放了些被小学生视为无价之宝的东西――一截粉笔；一个橡皮球；三个钓鱼钩和一块叫做&纯水晶球&的石头。

And he also put into the hat certain schoolboy treasures of almost inestimable value -- among them a lump of chalk, an India-rubber ball, three fishhooks, and one of that kind of marbles known as a "sure 'nough crystal."

然后他就在火堆旁跪下，用他那块红砚石在树皮上吃力地写了几个字；他把一块卷起来，放到上衣口袋里，另一块放在乔的帽子里，他把帽子挪远了一点后又在里面放了些被小学生视为无价之宝的东西——一截粉笔；一个橡皮球；三个钓鱼钩和一块叫做&纯水晶球&的石头。

And write some words on the blackboard with color chalks.

用彩色粉笔在黑板上写几句话。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。