1. Japan has always been on the cutting edge of technology.2. Google has always been ahead of the times, creating innovative products time and time again.
 on the cutting edge of ... ahead of the timesOn the cutting edge of technology/trends 就是走在科技/流行的尖端, 當然也可以用在醫藥, 外科手術, 能源, 等等，而 ahead of the times 常形容一個人想法新潮。
這是一個連環問題: 燃燒石油導致二氧化碳增加，二氧化碳增加導致溫室效應，溫室效應導致冰層融化、海平面上升。 (請填空)
This is a chain of problems. Burning oil leads to increase in carbon dioxide, which leads to the greenhouse ffect, which leads to melting of glaciers, which leads to rising sea levels.