underwater blasting[ˈʌndəˌwɔ:tə ˈblɑ:stiŋ] 水底爆炸;

underwater cutting[ˈʌndəˌwɔ:tə ˈkʌtɪŋ] 水中切割;

underwater swimming[ˈʌndəˌwɔ:tə ˈswɪmɪŋ] 潜泳;

underwhelming[ˌʌndəˈwelmɪŋ] adj.（响应或回应）不热烈的;

underwing['ʌndəwɪŋ] n.后翅，后翅色彩瑰丽的蛾;下翅;

underwriting['ʌndəˌraɪtɪŋ] n.保险业;包销;

undeserving[ˌʌndɪˈzɜ:vɪŋ] adj.不值得…的;

undesigning['ʌndɪ'zaɪnɪŋ] adj.直爽的，诚实的;

undeviating[ʌn'di:vɪeɪtɪŋ] adj.不离正道的，坚定不移的;

undifferentiated marketing[ˈʌnˌdifəˈrenʃieitid ˈmɑ:kɪtɪŋ] 无差异行销;

undiscerning['ʌndɪ'zɜ:nɪŋ] adj.无辨别力的，迟钝的，无眼力的;

undiscriminating['ʌndɪ'skrɪmɪneɪtɪŋ] adj.不加区别的，无鉴别力的，一视同仁的;

undissembling['ʌndɪ'semblɪŋ] adj.不加掩盖（或掩饰）的;真诚的;坦率的;公开的;

undocking[ˈʌnˈdɔkɪŋ] v.使出坞，驶离码头( undock的现在分词 );

undoing[ʌnˈdu:ɪŋ] n.毁灭;取消;解开;毁灭或失败的原因;

undoubting[ʌn'daʊtɪŋ] adj.不怀疑的，信任的;

undraping[ˈʌnˈdreipɪŋ] v.除去帐幕，揭幕( undrape的现在分词 );

undrawing['ʌn'drɔː] v.拉开，被…拉回( undraw的现在分词 );

undressing[ʌnd'resɪŋ] v.脱衣服( undress的现在分词 );

undulating['ʌndjəˌletɪŋ] v.波动，起伏，呈波浪形( undulate的现在分词 );使波动，使起伏，使成波浪形;波状;

undying[ʌnˈdaɪɪŋ] adj.不死的，不朽的，永恒的;

unearthing[ʌnˈɜː(r)θɪŋ] v.发掘或挖出某物( unearth的现在分词 );搜寻到某事物，发现并披露;

unedifying[ʌnˈedɪfaɪɪŋ] adj.无启发性的，无益于教化的，（道德上）令人厌恶的;

unending[ʌnˈendɪŋ] adj.无止境的，不停的，不断重复的;

unenduring 不持久的;

unenlightening['ʌnɪn'laɪtnɪŋ] adj.无启发作用的;

unenterprising['ʌn'entəpraɪzɪŋ] adj.无事业心的，没有冒险精神的，无进取心的;

unerring[ʌnˈɜ:rɪŋ] adj.准确无误的;无偏差的;一贯正确的;可靠的;

uneven dyeing[ʌnˈi:vən ˈdaiiŋ] 染色不匀;

unexciting[ˌʌnɪkˈsaɪtɪŋ] adj.不令人兴奋的;