'A doughnut,<br />Swiss cheese,<br />the ozone layer'
things with holes
COMMON BONDS: A doughnut,<br />Swiss cheese,<br />the ozone layer
A doughnut,<br />Swiss cheese,<br />the ozone layer
A doughnut,<br />Swiss cheese,<br />the ozone layer
COMMON BONDS
things with holes
COMMON BONDS