TERRAIN_SELECTION = [
    ('water', '水域'),
    ('desert', '荒漠'),
    ('plain', '平原'),
    ('forest', '森林'),
    ('mountain', '山脉'),
    ('snow', '雪地'),
]

RESOURCE_TYPE_SELECTION = [
    ('wood', '木材'),
    ('food', '食物'),
    ('stone', '石料'),
    ('fish', '鱼获'),
]