The oil slick appeared as a tangle of dull gray on the ocean surface, made visible to the satellite sensor by the sun's reflection on the ocean surface.
浮油区在海面上呈现为一团暗灰色，因为海面对太阳光的反射才使卫星传感器能够发现它。
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If you're using a framework that requires this for some reason, see if you can satisfy it by providing a private no-argument constructor (which is visible via reflection).
The latest versions of this framework are moving away from the convention/reflection method to an external configuration that maps user-visible attributes and operations to the code elements.