a problem

• The world food imbalance is a problem of agricultural ecosystems and their management .
  世界粮食生产的不平衡是农业生态系统及其管理部门的一个问题。
• The auxiliary chemicals used in aqueous dyeing can also present a problem to biological process .
  用于水相染色的一些化学辅助剂用生物法处理也有些问题。
• Before i close, i must call your attention to a problem we have to face, this coming year .
  我在结束之前，必须向各位指出一个我们在新的一年中应当正视的问题。
• As always when a problem is inverted we have to be careful and check if the solution is unique .
  当一个问题反演时，我们往往必须注意检验一下解是否具有唯一性。
• This boy represents but a tiny aspect of a problem whose reality sprawls over the whole nation .
  这孩子只代表问题的一小部分，而整个现实问题却蔓延在整个国家。
• They do not enjoy sitting and deliberating over a problem unless it is tremendously fascinating .
  他们不愿意坐在那里，考虑一个问题，除非是极其动人心魄的问题。
• No honor could be more avidly sought than solving a problem posed by so great a man .
  没有任何一种荣誉能够比解决由这样一位伟大人物提出来的问题更会令人神往了。
• During the winter month in arid climates, the outside dew point is low so that mildew is seldom a problem .
  冬季的月份里，气候干燥，户外露点低，因此很少发生霜霉病。
• A problem related to nitrification is a drop in ph for the system due to the formation of nitric acid .
  和硝化作用有关的一个问题就是由于生成硝酸而使系统内的PH值降低。
• Andrew's mind was not really on celia's endeavours; he was preoccupied with a problem of his own .
  安德鲁的心思并不真在西莉亚的所作所为上，使他心事重重的是他自己的问题。