back board

基本解釋

The back board is provided with a pin connected electrically with the ground wire.
背板具有引腳，該引腳與接地線電性連接。
ip.com
Secondly, it indicates that the back board has the great influence on the sound field and it needs to consider the factor of the back board fully when designing the dome.
背板材料對導(dǎo)流罩內(nèi)部聲場的平穩(wěn)程度影響較大，在導(dǎo)流罩設(shè)計時應(yīng)予以充分考慮。
The utility model is characterized in that one concave side of the back board is provided with two elastic bands.
其特征是背板凹進(jìn)去的一側(cè)安有兩根松緊帶。
ip.com

That's the finger thing from left finger to right finger going back and forth across the board, never touching a number more than once.
在合并時，我的左手手指,和右手手指來回地在黑板上移動，但對每個數(shù)字只會碰到一次。
哈佛公開課 - 計算機科學(xué)課程節(jié)選
I already said, back here, when I used this board, that this idea was really important.
我們設(shè)置下場景，我已經(jīng)說了，回到這里，當(dāng)我用這塊黑板的時候。
麻省理工公開課 - 計算機科學(xué)及編程導(dǎo)論課程節(jié)選
And then they have to come back to the board meeting and report what they've learned.
之后，他們必須回到董事會上,報告他們所了解到的情況。
斯坦福公開課 - 戴爾CEO-Michael.Dell談創(chuàng)業(yè)和發(fā)展課程節(jié)選

The NHL desperately needs to get those 30% of people back on board to keep the momentum going.
FORBES: NHL Lockout Is Over, But Will The Fans Come Back?