v. 支撑,撑住;忍耐,经受;维持,保持;支持
拆分: sus-下 + -tain-握,持有
例:The arches sustain the weight of the roof. 拱梁支撑起了屋顶的重量。The branches could hardly sustain the weight of the fruit. 树枝几乎承受不住果实的重量。