但我们不掌握确切解释这些信号的科学知识。
But we do not have the scientific knowledge to interpret these signals with certainty.
最成功的投考者不总是知识水平最高者；他们是高压之下掌握考试技巧最老练者。
The most successful candidates are not always the best educated； they are the best trained in the technique of working under duress.
还是知识点掌握不牢？
不少人由于不掌握优生优育知识，导致了一例例病残儿的出生，给家庭和社会带来了沉重的负担。
But due to inexperienced prospective parents, some babies were born with birth defects, which places a heavy burden on their families and on society as well.
练习以模仿为主，对语音知识的讲解只作简明扼要的叙述，不面面俱到，设计的练习内容侧重在难音难调上，使学习者掌握纯正的汉语语音。
Explanations are kept to a minimum; the focus is on drilling difficult syllables and tones to help learners master natural and standard Chinese pronunciation.
文章用大量例子和事实充分论证了不掌握大量的异域文化背景知识就搞不好翻译这一观点。
By use of many examples and facts, I fully prove the point that translation can't be done well without sufficient cultural knowledge.
文章用大量例子和事实充分论证了不掌握大量的异域文化背景知识就搞不好翻译这一观点。
By use of many examples and facts, I fully prove the point that translation can't be done well without sufficient cultural knowledge.
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