In places, the water table is declining at a rate of a meter a year, necessitating the periodic deepening of wells and the use of ever-more-powerful pumps.

在一些地方，水位正以每年一米的速度下降，需要定期加深井并使用更强大的水泵。

youdao

So is my version of the periodic table wrong?

那么我的元素周期表是错的吗？

youdao

Early versions of the periodic table had gaps, missing elements.

早期的元素周期表有空缺，缺少一些元素。

youdao

People who remember the periodic table of the elements from chemistry class might recognize them.

VOA: special.2010.10.08

And en route we discovered that we can divide the Periodic Table into metals, 75% which is about 75% of the Periodic Table.

我们发现,我们能够将元素周期表划出金属，大概占。

麻省理工公开课 - 固态化学导论课程节选

If you click on Courseware you will get to this menu, the first of which preferences is Periodic Table.

如果你点击课件，就会来到这个菜单，第一个选择就是周期表。

麻省理工公开课 - 固态化学导论课程节选

Elements 110, 111, and 112 on the Periodic Table of Elements were discovered some time ago, but their names in the Periodic Table of Elements have been the difficult to pronounce names Ununnilium, Unununium, and Ununbium.

FORBES: Three More Chemical Elements Now Have Names

But right - he just go rattles through the table of - periodic table (unintelligible).

NPR: Serenading Science In A New Rock Album

School administrators not sharing the periodic table of the elements with their science classes?

WSJ: Roma Downey and Mark Burnett: Why Public Schools Should Teach the Bible