The warning symbol is displayed because there is no implementation for the component yet.

将显示警告标志，因为组件尚没有实现。

youdao

Pay special attention to the hazard notes in the instruction manual marked with this warning symbol.

要特别注意说明书中标有这个危险标志的注意事项。

youdao

In Navevo's case the data will be used to flash a warning symbol on its sat-nav maps when a driver approaches a "warning zone" with a 50m (164ft) radius circle drawn around the area.

BBC: Navevo sat-nav offers cyclist alerts to lorry drivers

What seems to be happening is that Mr Rocker is turning into a living symbol, a dire warning of deplorable behaviour, and a case study in the dangers of offending public sensibility.

ECONOMIST: John Rocker, under fire