纳粹时期的征用致使所有权不明确。Ownership is not clear because of expropriations in the Nazi era.法律上不明确a lack of clarity in the law对于应该采取什么正确步骤，还是有些不明确。There is some confusion about what the correct procedure should be....
They also secrete a waxy, transparent substance called cutin.它们还分泌蜡质的透明物质,称作角质.Cutinization The impregnation of a plant cell wall with cutin.角化作用(角质化):角质陆续侵渗植物细胞壁的过程.It will get better result after removing the cutin.祛角质...