That deep sigh could only express Helen's sadness.
那深深的叹息，不外乎表示出海伦的悲哀。
日常应用会话口语
Unhappiness(悲伤)（一）
📚 句中词汇解析
从本句中提取的重要词汇
v. 表达;表示;显而易见;快递邮寄;
adj. 特快的;迅速的;用快递寄送的; 明确的;
n. 特快列车;快递服务;
adv. 使用快速服务;
💡 ex出来+press挤压 → 挤出来 → 表达；特快
"I feel impelled to express grave doubts about the project."
我觉得不得不对这项计划深表怀疑.
近义：manifest, phrase, reveal, say, show, speak
n. 悲哀，忧伤，忧愁，悲哀;令人悲哀或忧伤的事物;愁眉苦脸，心境恶劣，心情恶劣;认真;
💡 sad悲伤 + ness 表性质，状态 → 悲哀
"Her novels are infused with sadness."
她的小说充满哀伤。
近义：heartsickness, heaviness, melancholia, melancholy, moroseness, mournfulness
反义：hilarity, jollification, jolliness, jollity, joyance, joyfulness
adj. 深的;深远的，深奥;重大的，深刻的;强烈的，痛切的，深厚的;
n. 深处，深渊;
adv. 深深地，深入地;
💡 地铺(谐音):地铺很 深 网友：马胜敏 补充：说明:如果把deep的p按照逆时针方向翻转180度就会变成deed(行为,事情) 如果把deep的d垂直翻转180
"Sam was born in the country and had a deep affinity with nature."
萨姆在乡下出生，特别喜爱大自然。
近义：abysmally, profoundly, deeply, abysmal, profound, chasmal
反义：shoal, superficial, simple, uncomplicated, basic, cushy
vi. 叹气;悲叹，悲鸣;
vt. 叹气地说;
n. 叹气，叹气声;
💡 傻(s)子哎(igh): 叹息 网友：yqy 补充：为何对着风景（sight）叹气（sigh）？没有看到t（它，指风景）呀
"He nuzzled up to his mother with a happy sigh."
他依偎着母亲满意地舒了口气.
近义：suspire, suspiration