1. Alexei Nikolaevich Romanov, the youngest tzarevich, was the only son of Tsar Nicholas II and Tsarina Alexandra.（阿列克谢·尼古拉耶维奇·罗曼诺夫是沙皇尼古拉斯二世和沙皇妃亚历山德拉的幼子，也是唯一的儿子。）
2. The tzarevich was expected to succeed his father as the next ruler of Russia.（沙皇儿子被期望成为俄罗斯的下一任统治者。）