The mesophyll consists of two layers of palisade parenchyma.叶肉是由两层栅栏薄壁组织组成.Aerenchyma is well developed in mesophyll.叶肉中通气组织发达,且均有不规则裂生性气腔.The larva eats the mesophyll tissues and makes the leaves yellow and deciduous.幼虫...
It is generally known that the overseas Chinese are a hardworking lot.众所周知华侨是刻苦耐劳的.He was incompetent yet hardworking.他能力较弱,但工作还是勤勤恳恳的。Be thrifty and hardworking in whatever undertaking you are to start on.办任何事都要勤俭.Stron...
Here the Nile broadens out between the huge granite boulders.尼罗河在此处变宽，从两块花岗岩巨石间穿过。The Aswan Dam helps to control the River Nile in Egypt.阿斯旺水坝有助于控制埃及的尼罗河....the navigable portion of the Nile.尼罗河适合航行的河段The Aswan Dam harne...