Because statistically speaking, students that are homeless or that have unstable living conditions, well, they rarely complete high school.

因为从统计上来说，无家可归或生活条件不稳定的学生很少能完成高中学业。

Too much rain, too little rain, frosts, bad weather conditions or very unreliable unstable weather conditions can have a very big impact on how much a coffee farmer could harvest per year.

雨水太多、太少、霜冻、恶劣的天气条件或非常不可靠的不稳定天气条件会对咖啡农每年的收成产生很大影响。