英語翻譯：

core

例句：

1. 每天早晨這位仆人修剪燈芯，添加燈油。
   The servant trims the lamp every morning.
2. 石膏灰泥板，灰膠紙柏板由石膏灰泥作芯板結(jié)合幾層纖維板或紙漿板制成的硬板，在建筑中用于代替灰泥或木板來建造墻壁
   A rigid board made of layers of fiberboard or paper bonded to a gypsum plaster core, used instead of plaster or wood panels in construction to form walls.
3. 這些大木材，表面上看被煙熏得黑黑的，有些地方被蟲蛀了，爛了，但內(nèi)芯卻是十分堅(jiān)硬的。
   The great timbers, darkened now by smoke, wormed in places, looking rotten on the surface, but hard in the core, hard as iron.