冷冻

May I see your driver's licence ?

我可以看看你的驾照吗？

The water content in leaf and stem of Rhododendrons is higher in June, July and August and the maximum is in July. The growth increment of stem accounts for 60％～80％.

杜鹃的枝叶含水量在一个生长季中呈单峰型，以降低含水量来渡过慢长的休眠期。6、7、8月枝叶水分含量较其它月份为高。7月份枝叶含水量最高，叶片平展，新枝生长量占全年生长量的60％～80％。