The number at the bottom is the recommended water temperature in centigrade.
底部的数字为建议性摄氏度水温。
《柯林斯英汉双解大词典》
2
A number of products have been developed which are permeable to air and water.
已开发出许多可渗水透气的产品。
《柯林斯英汉双解大词典》
3
Nevertheless, a good number of thoroughgoing land animals later turned around, abandoned their hard-earned terrestrial re-tooling, and returned to the water again.