您要查找的是不是：
- Some pumps and all vacuum cleaners work by suction. 有些泵和所有真空吸尘器都是借吸力工作的。
- His wife's death left him a vacuum in his life. 他妻子的去世使他的生活变得空虚。
- The chef sprinkle poppy seed on the cake. 厨师往蛋糕上撒罂粟籽。
- Her husband's death left a vacuum in her life. 她丈夫的死使她的生活变得空虚。
- Some people are living in a vacuum. 有些人过着与世隔绝的生活。
- Part of every crop is saved for seed. 每一种庄稼都留一部分作种子。
- A vacuum cleaner is a handy household tool. 吸尘器是一种使用方便的家庭用具。
- The shop repairs vacuum cleaners. 这家店修理吸尘器。
- The porter turned off the vacuum. 清洁工关掉真空吸尘器。
- The farmers were scattering seed on the fields. 农夫把种子撒在田里。
- Bursting apart, as some seed pods when ripe. 爆裂的，如一些荚果成熟时
- The symbol for the speed of light in a vacuum. 表示真空中光速的物理符号
- Temperature is most important for seed germination. 温度对种子的发芽至关重要。
- The seed has a hard exterior covering. 这种子外壳很硬。
- Sealed under low pressure or a partial vacuum. 抽空密封的在低压或部分真空状态下密封起来的
- The seed of a fleshy fruit; a pip. 籽，种子肉质水果的种子; 籽
- He started to drink too much and gradually ran to seed. 他喝酒过多，身体逐渐衰弱了。
- Do you know about the evolution of a seed into a plant? 你知道从种子发展成为植物的过程吗？
- Dirt and dust are drawn into a vacuum cleaner by suction. 污物和灰尘被吸入吸尘器。
- We could not pull apart two plates which enclosed a vacuum. 如果两个盘子间是真空，我们就无法将它们分开。
