The teacher is cleaning the blackboard with a board rubber.

老师正在用黑板擦擦黑板。

youdao

The scope of Ford's recent rubber research, which was funded in part by grants from the United Soybean Board (USB), included the use of soy fillers (flour, meal) as well as soy oils.

通过美国大豆委员会的资助，福特最近的橡胶材料研究范围包括大豆填充物（面粉，食品）和豆油的使用。

youdao

He set forth from the Canaries in a rubber dinghy, with all food on board locked away.

他乘坐一艘橡皮艇从西拔牙的加纳丽群岛出发，把船上携带的食品锁了起来。

youdao

But seven counties had voted against the proposals, and the ECB's management board has not rubber-stamped the plan.

BBC: County schedule for 2011 delayed after disagreement

Loit then saw off Alexandra Stevenson 6-4 6-2 in 54 minutes to put France 4-0 up before the USA finally got on the board in the final rubber.

BBC: SPORT | Tennis | France win Fed Cup

Bruce had negotiated a new deal with Birmingham's current board but Yeung has not yet rubber stamped the contract.

BBC: Foxes reject Bolton's Megson move