on the barrel

基本解释

First you need to create a cannonball and apply the same material used on the barrel.
首先，您需要创建一个炮弹，采用与炮筒同样的材质。
Not as happy as it would have made him to see her stop gumming on the barrel of her toy gun, but he wasn't complaining.
尽管这还不像看到她粘着手上的玩具枪不放时那么高兴，不过这什么好抱怨的。
With Uncle Sam offering cash on the barrel, however, it may be tempting for firms to enter a game of chicken and demand a price that will allow their shareholders and management to suffer little.
山姆大叔掏出大桶现金，然而，这可能诱使那些公司进入一场小鸡游戏，为了减少持股人和管理层的损失而要求一个不当的价格。

With its distance and depth of field scales on the barrel, the FUJINON XF14mm (21mm) F2.8 lens is ideally suited for a range of shooting techniques.
ENGADGET: Fujifilm grows X-series mirrorless lineup with 16.3-megapixel X-E1
When you've been assigned a wave, you'll then be placed on a wait list, only told a week before you have to place cash on the barrel for a handset.
ENGADGET: Republic Wireless now issuing invites for summer beta program: is your name on the list?
Additionally, it features a macro switching ring on the lens barrel which instantly shortens the minimum focusing distance to approximately 20cm (from image plane), allowing the camera to capture small, close-up subjects with exquisite detail.
ENGADGET: Sony's Cyber-shot RX1 compact camera packs a full-frame sensor, 'fits in your palm' (hands-on)