1. We've made a tentative plan for the vacation but haven't really decided yet.
   我们拟定了一个度假计划, 但是没有真正定下来。
2. After the millenary of tentative idea, mankind can roam wantonly in infinite universe , is that to be so secret, so magical!
   设想千年以后人类可以在无限的宇宙中任意遨游，那是多么奥妙，多么神奇！
3. Hoarseness and a mass hard in consistency over the thyrohyoid memebrane with supraglottic tumefaction led to a tentative diagnosis of supraglottic laryngeal cancer.
   我们遭遇一个喉结核的病例，其独特的临床表徵极类似上喉癌。
4. But he was very tentative, fastidiously so, letting Ruth set the pace of sprightliness and fancy, keeping up with her but never daring to go beyond her.
   但是他却很小心，甚至过分小心，只紧跟露丝定下的快活和幻想的尺度，不敢轻易越雷池一步。

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