兴奋性刺激超过某一临界值以前毫无反应.Nothing happens until the excitatory stimulus exceeds a certain'threshold'value.临界点所对应的刺激强度为临界值.The ceitical valueis stimulus intensity corresponding to the critical point.因为9.55>3.78, 其中3.78...
Our camping trip was spoilt by bad weather.天气不好，破坏了我们的露营旅行。Mother gave us the green light to go on the camping trip.母亲准许我们露营旅行.The troops will be passing through our village on their camping trip.野营部队要从咱们村过....