杂草中危害通常仅限于叶脉间的条状区域.On grasses, injury is usually confined to areas between the veins.叶脉有两种:平行脉和网状脉.There are two kinds of venation , parallel and net.叶脉中木质部比重越大,越有利于水分的传输.Large proportion of xylem benefit to the water tr...
Reactions with various enzymes showed hemicellulase and pectinase had synergistic effect on improving extraction rate.不同的酶作用对核酸酶提取的影响显示:纤维酶、半纤维酶和果胶酶对麦芽根破壁具有协同作用.OBJECTIVE : To study the synergistic mechanism of Shuanghua...
At dusk we pitched camp in the middle of nowhere.黄昏时，我们在茫茫荒野中扎营。At first sight it looked less like a capital city than a mining camp...乍看上去，它不像是首府，更像是矿工村。...a refugee camp...难民营It would be presuming to camp in a person&#...
The people at control have already begun to count down.控制站的人员已经开始倒计时了.The spaceship will soon be launched, the people at control have already begun to count down.宇宙飞船很快就要发射了, 控制室的人已经开始在倒数了.The people at Control have alre...