两层的

Porosity logging methods examining gas reservoirs of sandstone and argillaceous sandstone through acoustic wave and density are effectively used in coal beds.

煤田中在煤层附近有煤层气砂岩储层、泥质砂岩储层的存在，声波、密度两种孔隙度测井是进行孔隙度探测的有效方法。

The most commonly used basting is a series of even stitches with a 1.0cm(3/8 inch) pickup, used to join two or more layers of fabric.

使用最普遍的粗缝是一系列均匀、针距间隔1.0cm(3/8英寸)的针迹。粗缝用于连接两层或多层面料。

The most commonly used basting is a series of even stitch es with a 1.0cm(3/8 inch) pickup, used to join two or more layers of fabric.

使用最普遍的粗缝是一系列均匀、针距间隔1.0cm(3/8英寸)的针迹。粗缝用于连接两层或多层面料。

The infolding of a portion of the outer layer of a blastula in the formation of a gastrula.

体腔高于腔肠动物和一些本源虫的所有动物体内的腔，由中胚层裂成两层形成。

Derived from two embryonic germ layers, the ectoderm and the endoderm.

双胚层的具有两个胚层的。

It will be noted that between the two layers there exist interstices of two types: tetrahedral and octahedral.

要注意两层之间有两种类型的空隙：四面体型和八面体型。

He dense inner region consists of high dense fibrils and flocculent vesicles. The primary spermatophore layer and secondary spermatophore layer show positive reaction to PAS.

EM显示：次级精荚壁由内外两层构成，内层致密，由电子密度高的纤丝和絮状泡组成，外层疏松，含有沟形网状结构和不规则的大絮状泡。

Place the circle below your other straight line and merge the two layers together.

把它放在你的艺术笔刷直线图层的下面，然后合并两个图层。

METHODS: To gain the middle layers between two slices, traditional shape-based interpolation used linear weighted mean algorithm.

较常用的形状插值方法是对变换后的相邻两层距离图像进行线性加权平均，从而获取中间层。

Sudden windstorm ruined two floors of a 14- storey building yesterday.

昨天突如其来的风暴摧毁了一座14层楼的两层。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失