Calcium block: It's pointless to put a calcium block cockatoo cages.
钙制品：把一些钙片放进凤头鹦鹉的笼子里这是毫无意义的。
Calcium block: It's pointless to put a calcium block into some cockatoo cages.
钙制品：把一些钙片放进凤头鹦鹉的笼子里这是毫无意义的。
Other vegetables with calcium, like spinach, collards, kale and beans, contain oxalates that block calcium absorption.
其他含钙质的蔬菜，像是菠菜，甘蓝菜和豆子含有草酸，会阻碍钙质吸收。
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