cross grain的用法和樣例：
例句
- Cleaning exposed the grain of wood.
清潔使木紋顯現可見。 - In splitting wood,don't try to go against the grain.
劈木柴時，要順著木紋劈。 - During flight back two black and white cross striations clearly visible.
飛行時背部兩道黑色和白色的橫紋清晰可見。 - The myocardial fibers are beginning to lose cross striations and the nuclei are not clearly visible in most of the cells seen here.
在大多數可見細胞中，心肌纖維的橫紋丟失，細胞核模糊。
