These are normally hidden, but if you press Control-H they become visible.

这些通常是隐藏的，不过，一按Ctrl + H，它们就看得见了。

youdao

H: Exactly.for example, the rising costs of commodities and energy supplies over which we have no real control.

霍尔：的确如此，譬如说，商品和能源的成本一直不断增加，对此我们没有得到真正的控制。

youdao

H. Buy nonconforming product control processing.

采购产品的不合格控制处理等。

youdao

She says the lack of attention and self-control that mark A.D.H.D.

VOA: special.2009.09.29

Among partisans on both sides, there is still a sense that a piece of gun control can be passed (starting with background checks) and perhaps a larger piece of immigration (starting with H-1B visas and legal status for the undocumented).

CNN: Obama's historic speech deepens divisions