| 1. | Ostracodes are small animals, most of which have a two valved shell .
介形虫是小型动物，其中大部份都具有两瓣的外壳。 |
| 2. | A large , valved , brass wind instrument with a bass pitch
大型带活塞的低音铜管乐器。 |
| 3. | Plastic packaging . large open - mouthed or valved sacks . flat or folded hose . specifications and tests
塑料包装.开口或带嘴的大容量包装袋.扁平或折叠式软管.规范和试验 |
| 4. | Respiratory protective devices - valved filtering half masks to protect against gases or gases and particles - requirements , testing , marking
呼吸保护装置.防气体或防气体和颗粒的阀滤式半面罩.要求试验和标记 |
| 5. | Respiratory protective devices - valved filtering half masks to protect against gases or gases and particles - requirements , testing , marking
呼吸保护装置.防毒气或毒气与颗粒的真空过滤式半面罩.要求试验标记 |
| 6. | Respiratory protective devices - valved filtering half masks to protect against gases or gases and particles - requirements , testing , marking ; german version en 405 : 2001
呼吸保护设备.防煤气或防煤气与粉尘的带阀过滤半罩式 |
| 7. | A valved brass wind instrument that produces a mellow tone from a long , narrow tube that is coiled in a circle before ending in a flaring bell
一种有活瓣的铜管乐器，从漩涡形且端部有喇叭口的又长又细的管子里发出圆润的乐音。 |
| 8. | To effectively change pitch on a valved brass instrument , two things come into play : the pressing of valves to effectively change the length of the tubing , and the player ' s lip aperture or " embouchure " setting , which determines the frequency of the pulsed air or vibrations into the instrument
要在按键乐器上改变音高，有两个方法能够办到：一、压下按键改变管子的长度，二、演奏者所吹出的气流改变嘴唇的振动频率。 |
