很有可能更多的动物将要灭绝: if we do not create nature reserves more animal species will probably become extinct
但: Ⅰ副词(只) only; just; merely 短语和例子不求有功, 但求无过 do not hope to distinguish oneself, but only not to make mistakes; 但说无妨 just speak out what is on your mind; 在辽阔的原野上, 但见麦浪随风起伏。 on the vast fields
