自強街87號

One of the oldest and most popular forms of packaging are bags.1 They are used for food storage, packaging and transporting goods and for waste disposal among many other uses. A plastic bag or polybag is defined as a container made of a thin, flexible plastic film which is open at one end. Although in any size, it is often called a "sack" if it can hold 25 kg / 50 lb or more. They are made of a multitude of materials. However, paper and polyolefin bags are undoubtedly the most popular types of bags and the lowest in unit cost. The majority of these plastic bags are heat sealed whereas paper bags are usually bonded and sealed with adhesives. 
HIGH-DENSITY POLYETHYLENE (HDPE)
Bags are often made of high density polyethylene (HDPE). This plastic is usually milky white or semi-translucent, has superior puncture, low permeability and temperature resistance, and is more rigid and stronger than LDPE / LLDPE but also tears easier and has a propensity to crinkle. Most shopping, grocery and trash bags in the USA are made of this plastic. HDPE is often chosen for its high strength and low cost.  

Michel Petrucciani was born on December 28, 1962 in Orange, Vaucluse, France and passed away on January 6, 1999 in New York City.
Michel Petrucciani was born to Italian parents in Montpellier, France. His family was musical, and as a child he played the drums in a band with his father, Tony, a guitarist, and his brother Louis, a bassist. Michel was born with osteogenesis imperfecta, also known as “glass bones,” a disease that stunted his growth (he was only three feet tall and weighed barely 50 pounds) and weakened his bones.
From the beginning, Petrucciani had always been musical, reportedly humming Wes Montgomery solos by the time he learned to speak. The musician that would prove most influential to Petrucciani was Bill Evans, who he began listening to at around the age of ten. Petrucciani’s layered harmonies, lyrical style, and articulation of melody have always been linked most strongly to this early exposure to Evans. Petrucciani trained in classical piano starting at the age of four, and was making music with his family by the age of nine.

PM2.5到底是什麼？影響到底有多大？

空氣中的汙染物很多，其中漂浮在空氣中「類似灰塵」的粒狀物稱為懸浮微粒（particulate matter, PM），而通常我們在提的PM2.5就是指，其懸浮微粒「小於或等於2.5微米(μm)」的粒子。這樣講似乎不知道這樣的粒子到底有多細小，就拿人體上最細小的「頭髮」來說，懸浮微粒2.5微米約為頭髮直徑的1/28，這樣的小粒子會穿透肺泡，並且跟著血液循環全身。

而這麼細小的懸浮微粒，在大氣中飄散，有可能是硫酸鹽、硝酸鹽及銨鹽等有毒物，或是附著了戴奧辛、重金屬等物，通過呼吸系統，透過肺泡與動脈血液交換進入體內，長期在這樣的狀況下，不僅會引起嚴重過敏甚至會引發氣喘；嚴重時還會增加心血管疾病、肺部疾病的機會。

今天和學生打賭，至明年六月三十日以前要瘦回八十公斤以下。沒完成，每多一公克，輸台幣一元。

現在尚有 30 公斤須甩掉，還有七個月的時間，規劃如下：

@ 肉：降龍、伏虎、白丁。

the following sentences are all grammatically correct. can you tell me why? :)

1. The old man the boat.

2. The horse raced past the barn fell.