群落的交错区。

森林群落交错区

群落交错区的特征是（）。

翻译：With Average or With Particular Average（WA or WPA）（）

生态系统多样性：生态系统多样性是指生物群落和生境类型的多样性。主要有森林生态系统、草原生态系统、荒漠生态系统、农田生态系统、湿地生态系统和海洋生态系统等。

一个生态系统的生物群落越简单，它的生物生产力越高。

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

1929年意大利的（）教授正式开设农业生态学课程并正式出版农业生态学一书。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。