When Dmitri Mendeleev devised his periodic table in 1869, it contained 63 elements; a similar chart in a chemistry classroom now has up to 118 entries.

门捷列夫于1869年制定周期表时，表中包含63个元素，而现在化学课堂中一个类似的图表元素已多达118个。

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When we entered the classroom, Angela went to sit at a black-topped lab table exactly like the ones I was used to.

我们走进教室以后，安吉拉坐到一张黑色台面的实验桌后，这种实验桌和我原来用过的一样。

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Note: the amplitude measurements shown in Table 3.1 are those values reported in clinical Settings. In a classroom setting, the amplitudes may be much lower.

注意：表3.1中的数据是在临床条件下获得的。在课堂上获得的振幅会更低很多。

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They have enjoyed the experience, they have come into a classroom and had lots of opportunities to learn through playing at different stations instead of sitting at a table.

BBC: Extra ?5m for play learning plan