You must have a facility, a curriculum and a faculty.
必须有设施，课程和教员。

A vacuum tube in which a hot cathode emits a beam of electrons that pass through a high voltage anode and are focused or deflected before hitting a phosphorescent screen.
阴极射出一束电子通过高压正极的真空管。

A molten metal moves from a crucible into a vacuum chamber through a tube.
熔融金属通过一根管子从熔炉进入真空室。

Harmonia axyridis ab. Bimaculata
异色瓢虫二斑变种

Study on Foraging of Harmonia axyridis ab. Bimaculata to Prey Odour Sources
异色瓢虫二斑变种对猎物搜索行为研究

He's very quick with his abacus.
他算盘打得很快。

The abacus fell down on the ground, and the beads went everywhere.
算盘摔到了地上，算盘珠散落一地。

But that position did not arise because of Abacus 2007-AC1.
但这些头寸并非源自Abacus2007-AC1交易。

She is a passive person like an abacus, lacking initiative in everything.
她是个算盘珠似的人，从来做事都是缺乏主动性的。

Sing the Song of Abacus, Learning Mental Arithmetic with an Abacus
唱算盘歌, 学珠心算

A Computational Model Based on the Abacus Abacus Machine
一种基于算盘的计算模型算盘机

Learn how to use an abacus.
学会用算盘。

She knew how to work on the abacus.
她会打算盘。

fiddle with the beads of an abacus.
拨弄算盘珠

Do you know how to work an abacus?
你会打算盘吗？

He can an abacus very well.
他算盘打得很好。

Hes very quick with his abacus.
他算盘打得很快。

They also learned to use the abacus.
他们还学习珠算。

I can use abacus skillfully.
我会熟练地打算盘。

Origin and Development of Abacus
珠算的起源与发展

I can use an abacus fairly well.
我算盘打得相当好。

She can reckon rapidly on the abacus.
她用算盘算得很快。

Computers are used instead of abacus.
算盘被计算机所取代。

Emphasis on teaching and Studing of abacus
应重视珠算的教与学

On the Abacus Teaching in the College
论大专院校的珠算教学