标签文本在AbsoluteLayout> StackLayout中溢出，超出网格

Question

我的标签文本超出了Grid的范围，为什么？

                        <AbsoluteLayout x:Name="alIFirst" AbsoluteLayout.LayoutBounds="1,1,1,.50" AbsoluteLayout.LayoutFlags="All" BackgroundColor="#90000000">
                            <StackLayout>
                                <StackLayout>
                                    <Label Style="{StaticResource beNewsSnapLabel}" Text="{Binding News_Item_Title_1}"/>
                                </StackLayout>
                                <StackLayout>
                                    <Label Style="{StaticResource beNewsSnapLabelContent}" Text="{Binding News_Item_Description_1}"/>
                                </StackLayout>
                            </StackLayout>
                        </AbsoluteLayout>