用法:
1 deep opening in the ground; abyss; gorge （地上的）深坑; 深渊; 峡谷.

用法:
2 (fig 比喻) wide difference of feelings or interests between people, groups, etc （人、 团体等的情感或利益的）巨大差距, 分歧:
the vast chasm separating rich and poor 贫富的鸿沟.

• secure
• security
• see
• seed
• seek
• seem
• segment
• seize
• selection
• selfish
• sell
• semester
• semiconductor
• seminar
• senate
• send
• senior
• sense
• sensible
• sensitive
• sentence
• separate
• sequence
• series
• serious