要发出紧急信号，使用“重要的事情说三遍”的“三”法则；三次呼喊、三声喇叭或三声哨声。
To signal an emergency， use the rule of three； 3 shouts， 3 horn blasts， or 3 whistles.
Natural gas will play a critical role in the energy mix as we move toward a lower-carbon future.
Architecture is not about solving problems, but about creating possibilities.