reticulated tracheid

例句：

1. 1.The wood was so dense that it had to be sawed into thin slices.
   木头太密了，必须把它切成薄片。
2. 2.The reticulated tracheids in the tree are essential for its survival.
   树中的复孔式导管对它的存活至关重要。
3. 3.In ancient times, people used reticulated tracheids to make tools and weapons.
   古代，人们用复孔式导管制作工具和武器。