The group notes that swallowing fluoridated toothpaste can cause problems.研究院提醒说把含氟牙膏吞下去会产生一些问题.Conclusion Fluoride bioavailability in fluoridated milk is still high and sufficient.结论氟化牛奶中氟的生物利用率是足够高的.Results Fluoridated...
An atom itself is a complete whole, with its electrons, protons and neutrons and other elements...一个原子本身就是一个完整的整体，包括电子、质子、中子及其他元素。The neutrons and protons form the core of the atom.中子和质子构成了原子核.A substance donates protons...
Books are now printed in braille.很多书现在都用盲文印.Braille typewriters and electric embossing machines are also used.布拉耶盲字可以使用打字机,近来还有电动凸版机的发明.Braille used raised dots, just as in night writing.在代码中,布莱叶使用突起的小点, 就像“夜间文字”中所用的小点一样...
Of scuds metals conduct heat most quickly. They are the best heat conductors.在所有的固体中金属传热最快, 它们是最好的导热体.Launch Scuds – Fires many, inaccurate Scud missiles at the target ( costs per use )射飞毛腿:朝目标射很多打不准的飞毛腿 ( 使用要钱 )...