chalk board 是什么意思

	1.	The following list is taken from data on the wwf visitor centre chalk board , birders note book , hkbws bbs and bird line ( english and chinese ) 以下记录摘自访客中心记录板、米埔雀鸟记录册、香港观鸟会新闻组及观鸟热线。
	2.	The following bird record list is compiled from data supplied by visitors to mai po nature reserve i . e . visitor centre chalk board , birders note book , hong kong bird - watching society bbs web service and bird line telephone service 雀鸟记录以下记录摘自访客中心记录板米埔雀鸟记录册香港观鸟会新闻组及观鸟热线。

chalk board是什么意思