高难度 high challenge ; HIGH DIFFICULTY ; Highly Difficult
最高难度 hardest ; VERY HARD
高难度飞车 Hot Wheels Slot Car Racing
高难度谈话 Difficult Conversations
哼唱难度较高的曲子 hum difficult pieces of music
单向高难度平衡盘 Balance Board
高难度攀登 Technical climbing
高难度动作 stunner, stunt
提高难度 Improve the degree of difficulty ; Increase in difficulty
难度高的测验 difficult test
研究人员注意到，海豚在确定答案时会很着急地按下踏板，但在难度高的测验中则表现出犹豫。
The researcher noted that the dolphin is quite eager to press the paddle when it was sure of the answer, but exhibited hesitation during difficult trials.
这些公园已经吸引了专业游客，包括来攀登技术难度高的山峰的登山者，以及被当地河流中的鲑鱼和鳟鱼吸引的渔民。
The parks already attract specialist visitors, including mountaineers, who come to climb the technically difficult peaks, and fishermen, lured by the salmon and trout in the region's rivers.
一旦海豚发现了按这个新踏板的结果，当测试难度非常高时，它就会很频繁地按这个踏板。
Once the dolphin figured out the result of pressing this new paddle, it did choose it frequently when the trial was difficult.
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