A fresh watermelon usually appears plump, firm, weighs heavy for its size and is well-proportioned. You can tell that a watermelon is fully ripe and juicy when you hear a deep and hollow sound as you tap it with your knuckles. If you want to buy sliced watermelons, an indication of freshness would be bright red, firm flesh and dark-colored seeds. Watermelons are usually at their peak from June to late August.
新鲜的西瓜看起来饱满、坚硬，称起来重，比例匀称。用指关节敲打西瓜，听到深沉、空洞的声音说明西瓜熟透了且多汁。如果你想买切好的西瓜，挑颜色鲜红、果肉坚硬、种子深色的。西瓜通常在六月至八月下旬成熟。