[其它] 求助： Harcourt G1 decodable 中不理解的地方

最近自己在先预习给儿子买的书。有些可以百度啊，词典查。但有些查了也不知道具体什么意思。比如
第8课 Dad, Beth, and the Pen
“ This pen has math facts on the top. This is a pen that can flip and flop".
" This big pink Pen is red and it can slink."
还是不清楚具体是怎么样的笔。

第9课 Bess, Bud, and the Junk
"Bud picked up a rug with rips, a tub with rust, plus, a bed with lumps". 到底是怎样的bed??