observe

• A degree of collective immunity may be observed .
  可见到一定程度的群体免疫力。
• He observed that it would probably rain .
  他说很可能下雨。
• We must observe the decencies .
  我们必须遵守社会行为标准。
• One must observe the rules .
  我们（任何人）必须遵守规则。
• I have no need to observe that .
  对于那件事，我无须申言。
• Oliguria is observed after hydration .
  输液后仍然少尿。
• This tendency is indeed observed experimentally .
  这种趋向在实验中也确实观测到了。
• What did the expedition observe ?
  这次考察观察什么呢？
• He had observed that miss keelder looked pensive .
  他注意到茎达尔小姐显得心事重重。
• Observe for respiratory distress .
  观察有无呼吸困难。