And the inner mucosa is made up almost entirely of mucous cells, which produce a protective coat that keeps the stomach tissues from getting digested along with your lunch.

内层粘膜几乎完全由粘膜细胞组成，粘膜细胞产生保护层，防止胃组织随着你的午餐被消化。

Stave churches were supported by stout pine poles - or " staves" - and slathered with a protective coat of black tar. Wood was plentiful and cheap.

木板教堂由粗壮的松木杆（或“木板”）支撑，并涂有一层黑色焦油保护层。木材丰富而便宜。