There are hundreds of related plants, including rubber trees, trees that produce castor and tung oil, and the cassava, a root crop.

属植物多达数百种，包括橡胶树、各种产蓖麻油和桐油树木，以及木薯这类块根作物。

Their attitude was exemplified by Sir John Cheke, who in 1557 wrote: " I am of the opinion that our tung should be written cleane and pure, vnmixt and vnmangled with borowing of other tunges."

他们态度在约翰·契克爵士身上得到了体现，他在1557年写道: “我认为我们语应该写得干净纯粹，不混杂其它外来语。”