The teacher is cleaning the blackboard with a board rubber.

老师正在用黑板擦擦黑板。

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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。

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Rubber boats with British marine commandos on board circled the Montecristo, while a helicopter hovered above.

装满了英国海军陆战队突击队员的救生船包围了“基督山”号，另外还有一辆直升机盘旋在上空。

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When you press a key on these models, its underside squishes through a layer of rubber that touches a circuit board.

WSJ: Keys That Really Click

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